diff --git a/crates/applications/multi_core_inverter/src/main.rs b/crates/applications/multi_core_inverter/src/main.rs
index b031cab..0346f4a 100644
--- a/crates/applications/multi_core_inverter/src/main.rs
+++ b/crates/applications/multi_core_inverter/src/main.rs
@@ -32,7 +32,7 @@
 
 use coremem::geom::{Meters, Torus};
 use coremem::sim::units::Seconds;
-use coremem::mat::Ferroxcube3R1MH;
+use coremem::mat::{Ferroxcube3R1MH, IsomorphicConductor};
 use coremem::spirv;
 use coremem::{Driver, SpirvDriver};
 
@@ -45,6 +45,8 @@ fn main() {
     let feat_size = um(10);
     let s_major = um(160);
     let s_minor = um(30);
+    let ctl_major = um(80);
+    let ctl_minor = um(30);
 
     let s0x = um(400);
     let sy = um(400);
@@ -55,14 +57,17 @@ fn main() {
     let duration = Seconds(ns(1));
 
     let s0 = Torus::new_xy(Meters::new(s0x, sy, sz), s_major, s_minor);
+    let ctl0 = Torus::new_yz(Meters::new(s0x, sy + s_major, sz), ctl_major, ctl_minor);
 
     let ferro_mat = Ferroxcube3R1MH::new();
+    let wire_mat = IsomorphicConductor::new(1e6);
 
     let mut driver: SpirvDriver<Mat> = Driver::new_spirv(sim_bounds, feat_size);
     driver.add_classical_boundary(sim_padding);
     driver.fill_region(&s0, ferro_mat);
+    driver.fill_region(&ctl0, wire_mat);
 
-    let prefix = "out/applications/multi_core_inverter/";
+    let prefix = "out/applications/multi_core_inverter/2/";
     let _ = std::fs::create_dir_all(&prefix);
     driver.add_state_file(&*format!("{}state.bc", prefix), 9600);
     driver.add_serializer_renderer(&*format!("{}frame-", prefix), 36000, None);