diff --git a/Cargo.lock b/Cargo.lock
index 1cf2a74..38803e4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3,7 +3,7 @@ name = "mpc"
 version = "0.0.1"
 dependencies = [
  "bincode 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "bn 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bn 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam 0.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -22,7 +22,7 @@ dependencies = [
 
 [[package]]
 name = "bn"
-version = "0.2.3"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -77,7 +77,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 name = "snark"
 version = "0.0.1"
 dependencies = [
- "bn 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bn 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "gcc 0.3.32 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/Cargo.toml b/Cargo.toml
index 4f9f04b..7bb3848 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ readme = "README.md"
 
 [dependencies]
 snark = { path = "./snark/" }
-bn = "0.2.3"
+bn = "0.3.0"
 crossbeam = "0.2.9"
 rand = "0.3.14"
 rustc-serialize = "~0.3.19"
diff --git a/snark/Cargo.toml b/snark/Cargo.toml
index f76cf41..f9e08c1 100644
--- a/snark/Cargo.toml
+++ b/snark/Cargo.toml
@@ -16,4 +16,4 @@ gcc = "0.3.*"
 [dependencies]
 libc = "0.2.*"
 lazy_static = "0.1.*"
-bn = "0.2.3"
+bn = "0.3.0"
diff --git a/src/bin/coordinator.rs b/src/bin/coordinator.rs
index 86af835..8eccce1 100644
--- a/src/bin/coordinator.rs
+++ b/src/bin/coordinator.rs
@@ -42,7 +42,7 @@ fn main() {
 
     println!("\tAll players have connected!");
     println!("Constructing constraint system and performing QAP reduction...");
-    let cs = CS::dummy();
+    let cs = CS::from_file();
     println!("\tDone.");
 
     let rng = &mut ::rand::thread_rng();
diff --git a/src/bin/player.rs b/src/bin/player.rs
index 7674a1a..86b02fa 100644
--- a/src/bin/player.rs
+++ b/src/bin/player.rs
@@ -35,11 +35,17 @@ fn main() {
 
     // Round 2: Powers of tau
     {
+        println!("Receiving current tau powers...");
+
         let mut cur_g1: Vec<G1> = decode_from(stream, Infinite).unwrap();
         let mut cur_g2: Vec<G2> = decode_from(stream, Infinite).unwrap();
 
+        println!("Calculating new tau powers...");
+
         secrets.taupowers(&mut cur_g1, &mut cur_g2);
 
+        println!("Sending new tau powers...");
+
         // Send spairs, new g1 / g2
         encode_into(&spairs, stream, Infinite).unwrap();
         encode_into(&cur_g1, stream, Infinite).unwrap();
@@ -48,19 +54,29 @@ fn main() {
 
     // Round 3: Random coeffs, part 1.
     {
+        println!("Receiving current random coeffs (stage1)...");
         let mut cur: Stage1Values = decode_from(stream, Infinite).unwrap();
 
+        println!("Calculating new random coeffs (stage1)...");
+
         secrets.stage1(&mut cur);
 
+        println!("Sending new random coeffs (stage1)...");
+
         encode_into(&cur, stream, Infinite).unwrap();
     }
 
     // Round 4: Random coeffs, part 2.
     {
+        println!("Receiving current random coeffs (stage2)...");
         let mut cur: Stage2Values = decode_from(stream, Infinite).unwrap();
 
+        println!("Calculating new random coeffs (stage2)...");
+
         secrets.stage2(&mut cur);
 
+        println!("Sending new random coeffs (stage2)...");
+
         encode_into(&cur, stream, Infinite).unwrap();
     }