diff --git a/Cargo.toml b/Cargo.toml
index e5b7f1c..faa1847 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,6 +16,7 @@ libipld = "0.16"
 libipld-core = "0.16"
 serde_ipld_dagcbor = "0.4"
 wnfs-common = { version = "0.2.0" }
+wnfs-unixfs-file = { version = "0.2.0" }
 
 # See https://doc.rust-lang.org/cargo/reference/profiles.html for more info.
 [profile.release.package.car-mirror-wasm]
diff --git a/car-mirror-reqwest/integration/axum.rs b/car-mirror-reqwest/integration/axum.rs
index 148fa1f..b43b18d 100644
--- a/car-mirror-reqwest/integration/axum.rs
+++ b/car-mirror-reqwest/integration/axum.rs
@@ -28,7 +28,8 @@ async fn main() -> Result<()> {
         .route("/dag/push/:cid", post(car_mirror_push))
         .with_state(ServerState::new());
 
-    let listener = tokio::net::TcpListener::bind("0.0.0.0:3344").await?;
+    let listener = tokio::net::TcpListener::bind("0.0.0.0:0").await?;
+    let port = listener.local_addr()?.port();
     tokio::spawn(axum::serve(listener, app).into_future());
 
     // You can issue requests from your client like so:
@@ -40,13 +41,13 @@ async fn main() -> Result<()> {
 
     let client = Client::new();
     client
-        .post(format!("http://localhost:3344/dag/push/{root}"))
+        .post(format!("http://localhost:{port}/dag/push/{root}"))
         .run_car_mirror_push(root, &store, &NoCache) // rounds of push protocol
         .await?;
 
     let store = MemoryBlockStore::new(); // clear out data
     client
-        .get(format!("http://localhost:3344/dag/pull/{root}"))
+        .get(format!("http://localhost:{port}/dag/pull/{root}"))
         .run_car_mirror_pull(root, config, &store, &NoCache) // rounds of pull protocol
         .await?;
 
diff --git a/car-mirror/src/lib.rs b/car-mirror/src/lib.rs
index f70c14d..377d517 100644
--- a/car-mirror/src/lib.rs
+++ b/car-mirror/src/lib.rs
@@ -64,22 +64,19 @@ pub mod messages;
 /// let client_cache = InMemoryCache::new(100_000);
 /// let server_cache = InMemoryCache::new(100_000);
 ///
-/// let file_bytes = async_std::fs::read("../Cargo.lock").await?;
+/// // At time of writing, Cargo.lock is 86KB, so this ends u ~8MB
+/// let file_bytes = async_std::fs::read("../Cargo.lock").await?.repeat(100);
 ///
 /// // Load some data onto the client
 /// let root = FileBuilder::new()
 ///     .content_bytes(file_bytes.clone())
-///     .fixed_chunker(1024) // Generate lots of small blocks
-///     .degree(4)
 ///     .build()?
 ///     .store(&client_store)
 ///     .await?;
 ///
 /// // The server may already have a subset of the data
 /// FileBuilder::new()
-///     .content_bytes(file_bytes[0..10_000].to_vec())
-///     .fixed_chunker(1024) // Generate lots of small blocks
-///     .degree(4)
+///     .content_bytes(file_bytes[0..1_000_000].to_vec())
 ///     .build()?
 ///     .store(&server_store)
 ///     .await?;
@@ -107,20 +104,16 @@ pub mod messages;
 /// # let client_cache = InMemoryCache::new(100_000);
 /// # let server_cache = InMemoryCache::new(100_000);
 /// #
-/// # let file_bytes = async_std::fs::read("../Cargo.lock").await?;
+/// # let file_bytes = async_std::fs::read("../Cargo.lock").await?.repeat(100);
 /// #
 /// # let root = FileBuilder::new()
 /// #     .content_bytes(file_bytes.clone())
-/// #     .fixed_chunker(1024) // Generate lots of small blocks
-/// #     .degree(4)
 /// #     .build()?
 /// #     .store(&client_store)
 /// #     .await?;
 /// #
 /// # FileBuilder::new()
-/// #     .content_bytes(file_bytes[0..10_000].to_vec())
-/// #     .fixed_chunker(1024) // Generate lots of small blocks
-/// #     .degree(4)
+/// #     .content_bytes(file_bytes[0..1_000_000].to_vec())
 /// #     .build()?
 /// #     .store(&server_store)
 /// #     .await?;
@@ -182,20 +175,16 @@ pub mod messages;
 /// # let client_cache = InMemoryCache::new(100_000);
 /// # let server_cache = InMemoryCache::new(100_000);
 /// #
-/// # let file_bytes = async_std::fs::read("../Cargo.lock").await?;
+/// # let file_bytes = async_std::fs::read("../Cargo.lock").await?.repeat(100);
 /// #
 /// # let root = FileBuilder::new()
 /// #     .content_bytes(file_bytes.clone())
-/// #     .fixed_chunker(1024) // Generate lots of small blocks
-/// #     .degree(4)
 /// #     .build()?
 /// #     .store(&client_store)
 /// #     .await?;
 /// #
 /// # FileBuilder::new()
-/// #     .content_bytes(file_bytes[0..10_000].to_vec())
-/// #     .fixed_chunker(1024) // Generate lots of small blocks
-/// #     .degree(4)
+/// #     .content_bytes(file_bytes[0..1_000_000].to_vec())
 /// #     .build()?
 /// #     .store(&server_store)
 /// #     .await?;
@@ -260,22 +249,18 @@ pub mod pull;
 /// let client_cache = InMemoryCache::new(100_000);
 /// let server_cache = InMemoryCache::new(100_000);
 ///
-/// let file_bytes = async_std::fs::read("../Cargo.lock").await?;
+/// let file_bytes = async_std::fs::read("../Cargo.lock").await?.repeat(100);
 ///
 /// // Load some data onto the client
 /// let root = FileBuilder::new()
 ///     .content_bytes(file_bytes.clone())
-///     .fixed_chunker(1024) // Generate lots of small blocks
-///     .degree(4)
 ///     .build()?
 ///     .store(&client_store)
 ///     .await?;
 ///
 /// // The server may already have a subset of the data
 /// FileBuilder::new()
-///     .content_bytes(file_bytes[0..10_000].to_vec())
-///     .fixed_chunker(1024) // Generate lots of small blocks
-///     .degree(4)
+///     .content_bytes(file_bytes[0..1_000_000].to_vec())
 ///     .build()?
 ///     .store(&server_store)
 ///     .await?;
@@ -303,20 +288,16 @@ pub mod pull;
 /// # let client_cache = InMemoryCache::new(100_000);
 /// # let server_cache = InMemoryCache::new(100_000);
 /// #
-/// # let file_bytes = async_std::fs::read("../Cargo.lock").await?;
+/// # let file_bytes = async_std::fs::read("../Cargo.lock").await?.repeat(100);
 /// #
 /// # let root = FileBuilder::new()
 /// #     .content_bytes(file_bytes.clone())
-/// #     .fixed_chunker(1024) // Generate lots of small blocks
-/// #     .degree(4)
 /// #     .build()?
 /// #     .store(&client_store)
 /// #     .await?;
 /// #
 /// # FileBuilder::new()
-/// #     .content_bytes(file_bytes[0..10_000].to_vec())
-/// #     .fixed_chunker(1024) // Generate lots of small blocks
-/// #     .degree(4)
+/// #     .content_bytes(file_bytes[0..1_000_000].to_vec())
 /// #     .build()?
 /// #     .store(&server_store)
 /// #     .await?;
@@ -378,20 +359,16 @@ pub mod pull;
 /// # let client_cache = InMemoryCache::new(100_000);
 /// # let server_cache = InMemoryCache::new(100_000);
 /// #
-/// # let file_bytes = async_std::fs::read("../Cargo.lock").await?;
+/// # let file_bytes = async_std::fs::read("../Cargo.lock").await?.repeat(100);
 /// #
 /// # let root = FileBuilder::new()
 /// #     .content_bytes(file_bytes.clone())
-/// #     .fixed_chunker(1024) // Generate lots of small blocks
-/// #     .degree(4)
 /// #     .build()?
 /// #     .store(&client_store)
 /// #     .await?;
 /// #
 /// # FileBuilder::new()
-/// #     .content_bytes(file_bytes[0..10_000].to_vec())
-/// #     .fixed_chunker(1024) // Generate lots of small blocks
-/// #     .degree(4)
+/// #     .content_bytes(file_bytes[0..1_000_000].to_vec())
 /// #     .build()?
 /// #     .store(&server_store)
 /// #     .await?;