diff --git a/Cargo.toml b/Cargo.toml
index ef047b6..cc47691 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "activitystreams"
 description = "Activity Streams in Rust"
-version = "0.5.0-alpha.13"
+version = "0.5.0-alpha.14"
 license = "GPL-3.0"
 authors = ["asonix <asonix@asonix.dog>"]
 repository = "https://git.asonix.dog/Aardwolf/activitystreams"
@@ -17,7 +17,7 @@ primitives = ["chrono", "mime", "serde", "thiserror", "url"]
 types = ["derive", "kinds", "primitives"]
 
 [dependencies]
-activitystreams-derive = { version = "0.5.0-alpha.5", path = "activitystreams-derive", optional = true}
+activitystreams-derive = { version = "0.5.0-alpha.6", path = "activitystreams-derive", optional = true}
 chrono = { version = "0.4", optional = true }
 mime = { version = "0.3", optional = true }
 serde = { version = "1.0", features = ["derive"], optional = true }
diff --git a/README.md b/README.md
index 1c33826..b361a34 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ __A set of Traits and Types that make up the ActivityStreams and ActivityPub spe
 
 First, add ActivityStreams to your dependencies
 ```toml
-activitystreams = "0.5.0-alpha.13"
+activitystreams = "0.5.0-alpha.14"
 ```
 
 ### Types
@@ -177,7 +177,7 @@ There are a number of features that can be disabled in this crate. By default, e
 enabled.
 
 ```toml
-activitystreams = { version = "0.5.0-alpha.13", default-features = "false", features = ["derive"] }
+activitystreams = { version = "0.5.0-alpha.14", default-features = "false", features = ["derive"] }
 ```
 
 | feature    | what you get                                              |
diff --git a/activitystreams-derive/Cargo.toml b/activitystreams-derive/Cargo.toml
index b79ea73..83becbd 100644
--- a/activitystreams-derive/Cargo.toml
+++ b/activitystreams-derive/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "activitystreams-derive"
 description = "Derive macros for activitystreams"
-version = "0.5.0-alpha.5"
+version = "0.5.0-alpha.6"
 license = "GPL-3.0"
 authors = ["asonix <asonix.dev@gmail.com>"]
 repository = "https://git.asonix.dog/Aardwolf/activitystreams"
diff --git a/activitystreams-derive/README.md b/activitystreams-derive/README.md
index 1d8f46f..983dd0c 100644
--- a/activitystreams-derive/README.md
+++ b/activitystreams-derive/README.md
@@ -10,7 +10,7 @@ Add the required crates to your `Cargo.toml`
 ```toml
 # Cargo.toml
 
-activitystreams = "0.5.0-alpha.12"
+activitystreams = "0.5.0-alpha.14"
 serde = { version = "1.0", features = ["derive"] }
 ```
 
diff --git a/activitystreams-derive/src/lib.rs b/activitystreams-derive/src/lib.rs
index f93c783..7042082 100644
--- a/activitystreams-derive/src/lib.rs
+++ b/activitystreams-derive/src/lib.rs
@@ -23,8 +23,8 @@
 //!
 //! First, add `serde` and `activitystreams-derive` to your Cargo.toml
 //! ```toml
-//! activitystreams-derive = "0.5.0-alpha.5"
-//! # or activitystreams = "0.5.0-alpha.12"
+//! activitystreams-derive = "0.5.0-alpha.6"
+//! # or activitystreams = "0.5.0-alpha.14"
 //! serde = { version = "1.0", features = ["derive"] }
 //! ```
 //!
@@ -195,11 +195,10 @@ pub fn ref_derive(input: TokenStream) -> TokenStream {
     };
 
     let name2 = name.clone();
-    let name3 = name.clone();
     let base_impl = quote! {
-        impl Base for #name3 {}
+        impl Base for #name {}
 
-        impl #name3 {
+        impl #name {
             /// Create from default
             pub fn new() -> Self {
                 Default::default()
@@ -213,6 +212,29 @@ pub fn ref_derive(input: TokenStream) -> TokenStream {
                 BaseBox::from_concrete(s)
             }
         }
+
+        impl<T> std::convert::TryFrom<Ext<#name, T>> for BaseBox
+        where
+            T: serde::de::DeserializeOwned + serde::ser::Serialize + std::fmt::Debug,
+        {
+            type Error = std::io::Error;
+
+            fn try_from(s: Ext<#name, T>) -> Result<Self, Self::Error> {
+                BaseBox::from_concrete(s)
+            }
+        }
+
+        impl<T, U> std::convert::TryFrom<Ext<Ext<#name, T>, U>> for BaseBox
+        where
+            T: serde::de::DeserializeOwned + serde::ser::Serialize + std::fmt::Debug,
+            U: serde::de::DeserializeOwned + serde::ser::Serialize + std::fmt::Debug,
+        {
+            type Error = std::io::Error;
+
+            fn try_from(s: Ext<Ext<#name, T>, U>) -> Result<Self, Self::Error> {
+                BaseBox::from_concrete(s)
+            }
+        }
     };
     let trait_impls: proc_macro2::TokenStream = input
         .attrs
@@ -859,9 +881,9 @@ pub fn properties(tokens: TokenStream) -> TokenStream {
             let enum_ty = Ident::new(&camelize(&format!("{}_{}_enum", name, fname)), fname.span());
 
             let set_many_ident =
-                Ident::new(&format!("set_many_{}s", fname), fname.span());
+                Ident::new(&format!("set_many_{}", pluralize(fname.to_string())), fname.span());
             let get_many_ident =
-                Ident::new(&format!("get_many_{}s", fname), fname.span());
+                Ident::new(&format!("get_many_{}", pluralize(fname.to_string())), fname.span());
 
             if field.description.required {
                 if field.description.functional {
@@ -1143,9 +1165,9 @@ pub fn properties(tokens: TokenStream) -> TokenStream {
                         Ident::new(&format!("get_{}_{}", fname, snakize(&v_ty.to_token_stream().to_string())), fname.span());
 
                     let set_many_ident =
-                        Ident::new(&format!("set_many_{}_{}s", fname, snakize(&v_ty.to_token_stream().to_string())), fname.span());
+                        Ident::new(&format!("set_many_{}_{}", fname, pluralize(snakize(&v_ty.to_token_stream().to_string()))), fname.span());
                     let get_many_ident =
-                        Ident::new(&format!("get_many_{}_{}s", fname, snakize(&v_ty.to_token_stream().to_string())), fname.span());
+                        Ident::new(&format!("get_many_{}_{}", fname, pluralize(snakize(&v_ty.to_token_stream().to_string()))), fname.span());
 
                     if field.description.required {
                         let doc_line = to_doc(&format!("Set `{}` with a value that can be converted into `{}`", fname, v_ty.to_token_stream()));
@@ -1513,3 +1535,11 @@ fn snakize(s: &str) -> String {
         acc
     })
 }
+
+fn pluralize(s: String) -> String {
+    if s.ends_with('s') || s.ends_with('x') {
+        s + "es"
+    } else {
+        s + "s"
+    }
+}
diff --git a/examples/de.rs b/examples/de.rs
index ae2c5bf..c7797ca 100644
--- a/examples/de.rs
+++ b/examples/de.rs
@@ -54,13 +54,13 @@ fn main() -> Result<(), Error> {
 
     let cprops: &CollectionProperties = collection.as_ref();
     let v: Vec<Ext<Page, ApObjectProperties>> = cprops
-        .get_many_items_object_boxs()
+        .get_many_items_base_boxes()
         .unwrap()
-        .map(|object_box| object_box.clone().to_concrete())
+        .map(|base_box| base_box.clone().to_concrete())
         .collect::<Result<Vec<_>, std::io::Error>>()?;
 
     let cprops: &mut CollectionProperties = collection.as_mut();
-    cprops.set_many_items_object_boxs(v.clone())?;
+    cprops.set_many_items_base_boxes(v.clone())?;
 
     println!("{:#?}", v);
 
diff --git a/src/lib.rs b/src/lib.rs
index 14c2cbc..8d8a8bf 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -25,7 +25,7 @@
 //!
 //! First, add ActivityStreams to your dependencies
 //! ```toml
-//! activitystreams = "0.5.0-alpha.13"
+//! activitystreams = "0.5.0-alpha.14"
 //! ```
 //!
 //! ### Types
@@ -209,7 +209,7 @@
 //! enabled.
 //!
 //! ```toml
-//! activitystreams = { version = "0.5.0-alpha.13", default-features = "false", features = ["derive"] }
+//! activitystreams = { version = "0.5.0-alpha.14", default-features = "false", features = ["derive"] }
 //! ```
 //!
 //! | feature    | what you get                                              |