diff --git a/Cargo.lock b/Cargo.lock
index e91aa0c..fc9182f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,26 @@
 # It is not intended for manual editing.
 version = 4
 
+[[package]]
+name = "auto-args"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "40797fd8889b7625595cb391d6f8428802b65c22023ada3dc08d67953ac5e5e2"
+dependencies = [
+ "auto-args-derive",
+]
+
+[[package]]
+name = "auto-args-derive"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d4cbc684c4d4c80b06cd1009b7b78fe5a910187d1daeda1cc04319207b5894f"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "cc"
 version = "1.2.31"
@@ -35,13 +55,32 @@ version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7edddbd0b52d732b21ad9a5fab5c704c14cd949e5e9a1ec5929a24fded1b904c"
 
+[[package]]
+name = "proc-macro2"
+version = "0.4.30"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf3d2011ab5c909338f7887f4fc896d35932e29146c12c8d01da6b22a80ba759"
+dependencies = [
+ "unicode-xid",
+]
+
 [[package]]
 name = "procon2"
 version = "0.1.0"
 dependencies = [
+ "auto-args",
  "rusb",
 ]
 
+[[package]]
+name = "quote"
+version = "0.6.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ce23b6b870e8f94f81fb0a363d65d86675884b34a09043c81e5562f11c1f8e1"
+dependencies = [
+ "proc-macro2",
+]
+
 [[package]]
 name = "rusb"
 version = "0.9.4"
@@ -58,6 +97,23 @@ version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
 
+[[package]]
+name = "syn"
+version = "0.15.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ca4b3b69a77cbe1ffc9e198781b7acb0c7365a883670e8f1c1bc66fba79a5c5"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-xid",
+]
+
+[[package]]
+name = "unicode-xid"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
+
 [[package]]
 name = "vcpkg"
 version = "0.2.15"
diff --git a/Cargo.toml b/Cargo.toml
index 0263a3d..3da1164 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,4 +4,5 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
+auto-args = "0.3.2"
 rusb = "0.9.4"
diff --git a/src/lib.rs b/src/lib.rs
index 8ad106c..756d729 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -133,7 +133,7 @@ impl<'t, Ctx: rusb::UsbContext> Controller<'t, Ctx> {
 
         // debug-print the header
         if self.verbose {
-            println!("HEAD: {:02x?}", &buf[..16]);
+            println!("CMD: {:02x?}\n  => {:02x?}", command, &buf[..16]);
         }
 
         let mut data = [0; 64];
diff --git a/src/main.rs b/src/main.rs
index 84671cb..26ee0a4 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,7 @@
 use std::{error::Error, fmt::Display, io::Write, path::Path, thread::sleep, time::Duration};
 
+use auto_args::AutoArgs;
+
 use procon2::{
     Controller,
     descriptor::{VID, pid},
@@ -25,16 +27,16 @@ const PLAYER: [u8; 16] = [
     0b1010,
 ];
 
-fn main() -> Result<(), Box<dyn Error>> {
-    let (mut dump, mut verbose) = (false, false);
+#[derive(Debug, AutoArgs)]
+struct Args {
+    /// Prints the sent and received messages
+    verbose: bool,
+    /// Dumps the firmware of all connected controllers
+    dump: bool,
+}
 
-    for arg in std::env::args() {
-        match arg.as_str() {
-            "dump" => dump = true,
-            "verbose" => verbose = true,
-            _ => {}
-        }
-    }
+fn main() -> Result<(), Box<dyn Error>> {
+    let Args { verbose, dump } = Args::from_args();
 
     let mut devices = vec![];
 
@@ -53,20 +55,9 @@ fn main() -> Result<(), Box<dyn Error>> {
     }
 
     if dump {
-        for (player, device) in devices.iter().enumerate() {
+        for device in &devices {
+            let path = make_path(device)?;
             let controller = Controller::new(device).verbose(verbose);
-            let descriptor = device.device().device_descriptor()?;
-            let name = if let Some(nid) = descriptor.product_string_index() {
-                device.read_string_descriptor_ascii(nid)?
-            } else {
-                String::from("procon")
-            };
-            let path = format!(
-                "{name} {:04x}_{:04x}_{}-{player:x}.bin",
-                descriptor.vendor_id(),
-                descriptor.product_id(),
-                descriptor.device_version()
-            );
             procon_dump(controller, path)?;
         }
         return Ok(());
@@ -92,6 +83,7 @@ fn main() -> Result<(), Box<dyn Error>> {
     Ok(())
 }
 
+/// Dumps a Controller's firmware to a file at the given path
 fn procon_dump<Ctx: rusb::UsbContext>(
     controller: Controller<'_, Ctx>,
     path: impl AsRef<Path> + Display,
@@ -105,11 +97,12 @@ fn procon_dump<Ctx: rusb::UsbContext>(
         file.write_all(&data)?;
 
         // progress bar
-        if addr % 0x8000 == 0 {
-            controller.set_player_led(PLAYER[7 - (addr >> 15 & 7)])?;
+        if addr % 0x40000 == 0 {
             print!(".");
             std::io::stdout().flush()?;
-            sleep(Duration::from_millis(0));
+        }
+        if addr % 0x8000 == 0 {
+            controller.set_player_led(PLAYER[7 - ((addr / 0x8000) & 7)])?;
         }
     }
 
@@ -117,3 +110,28 @@ fn procon_dump<Ctx: rusb::UsbContext>(
     println!("\nDumped to file {path}");
     Ok(())
 }
+
+/// Creates a path to store a given device's firmware at, avoiding naming collisions
+fn make_path<Ctx: rusb::UsbContext>(device: &rusb::DeviceHandle<Ctx>) -> rusb::Result<String> {
+    let descriptor = device.device().device_descriptor()?;
+    let name = match descriptor.product_string_index() {
+        Some(nid) => device.read_string_descriptor_ascii(nid)?,
+        None => String::from("procon"),
+    };
+
+    let path = format!(
+        "{name} {:04x}_{:04x}_{}",
+        descriptor.vendor_id(),
+        descriptor.product_id(),
+        descriptor.device_version()
+    );
+
+    let mut count = 1;
+    let mut out_path = format!("{path}.bin");
+    while std::fs::exists(&out_path).unwrap_or(true) {
+        out_path = format!("{path}({count}).bin");
+        count += 1;
+    }
+
+    Ok(out_path)
+}