diff --git a/crates/applications/multi_core_inverter/src/main.rs b/crates/applications/multi_core_inverter/src/main.rs
index c31267c..dbf6a58 100644
--- a/crates/applications/multi_core_inverter/src/main.rs
+++ b/crates/applications/multi_core_inverter/src/main.rs
@@ -40,13 +40,15 @@
 use coremem::geom::{Coord as _, Meters, Torus};
 use coremem::mat::{Ferroxcube3R1MH, IsoConductorOr, IsomorphicConductor};
 use coremem::meas;
+#[allow(unused)]
 use coremem::real::{self, Real as _};
 use coremem::sim::spirv::{self, SpirvSim};
 use coremem::sim::units::Seconds;
 use coremem::stim::{CurlVectorField, Exp, Gated, ModulatedVectorField, Scaled, Shifted, StimExt as _};
 use coremem::Driver;
 
-type R = real::R32;
+// type R = real::R32;
+type R = f32;
 type Mat = IsoConductorOr<R, Ferroxcube3R1MH>;
 // type Backend = spirv::CpuBackend;
 type Backend = spirv::WgpuBackend;
@@ -165,41 +167,11 @@ impl Params {
     }
 }
 
-
-fn main() {
-    coremem::init_logging();
-    // coremem::init_debug();
-    // let ns = |n| n as f32 * 1e-9;
-    let feat_size = um(10);
-
-    let params = Params {
-        input_magnitude: 1.0e7,
-        clock_phase_duration: ps(4000),
-        clock_decay: ps(1000),
-        // 's' = core (ferromagnetic part)
-        s_major: um(160),
-        s_minor: um(30),
-        // 'io' = drive/control wire
-        io_major: um(80),
-        io_minor: um(30),
-        coupling_major: um(130),
-        coupling_minor: um(30),
-        // coords for core 'n'
-        sy: um(400),
-        sz: um(280),
-    };
-
-    let sim_bounds = |num_cores| Meters::new(params.sx(num_cores), params.sy * 2.0, params.sz * 2.0);
-    let sim_padding = Meters::new(um(80), um(80), um(80));
-    
-    //////// define the control signals/transitions
-    // each row N denotes the drive currents at clock cycle N.
-    // each col M denotes the drive current at core M.
+/// 5 cores in sequence; analyze how they propagate a *specific* input signal
+#[allow(unused)]
+fn drive_map_5_core_inv(s0_init_state: ClockState, s0_rel_state: ClockState) -> [[ClockState; 5]; 14] {
     use ClockState::*;
-    // let s0_init_state = HoldHigh; // logic high
-    let s0_init_state = HoldLow; // logic low
-    let s0_rel_state = ReleaseLow;
-    let drive_map = [
+    [
         // charge each device to '1'
         [s0_init_state,HoldHigh,     HoldHigh,     HoldHigh,     HoldHigh],
         // this is when we'd ordinarily open S0 for write
@@ -234,7 +206,62 @@ fn main() {
         [Float,        HoldHigh,     HoldHigh,     HoldLow,      HoldLow],
         // open S1 for write
         [Float,        ReleaseHigh,  HoldHigh,     HoldLow,      HoldLow],
-    ];
+    ]
+}
+
+/// minimal 2-core inverter.
+/// analyze how the inverter transfers a zero v.s. a one.
+fn drive_map_isolated_inv() -> [[ClockState; 2]; 6] {
+    use ClockState::*;
+    [
+        // charge each device to '1'
+        [HoldHigh,   HoldHigh   ],
+        // let the cores settle
+        [ReleaseHigh,ReleaseHigh],
+        // write S0 -> S1. S1 should be *cleared* to 0.
+        [HoldLow,    Float      ],
+
+        // charge S0=0, reset S1 for next write
+        [HoldLow,    HoldHigh   ],
+        // let the cores settle
+        [ReleaseLow, ReleaseHigh],
+        // write S0 -> S1. S1 should *keep its state* of 1.
+        [HoldLow,    Float      ],
+    ]
+}
+
+
+fn main() {
+    coremem::init_logging();
+    // coremem::init_debug();
+    // let ns = |n| n as f32 * 1e-9;
+    let feat_size = um(10);
+
+    let params = Params {
+        input_magnitude: 1.0e7,
+        clock_phase_duration: ps(40000),
+        clock_decay: ps(6000),
+        // 's' = core (ferromagnetic part)
+        s_major: um(160),
+        s_minor: um(30),
+        // 'io' = drive/control wire
+        io_major: um(80),
+        io_minor: um(30),
+        coupling_major: um(130),
+        coupling_minor: um(30),
+        // coords for core 'n'
+        sy: um(400),
+        sz: um(280),
+    };
+
+    let sim_bounds = |num_cores| Meters::new(params.sx(num_cores), params.sy * 2.0, params.sz * 2.0);
+    let sim_padding = Meters::new(um(80), um(80), um(80));
+
+    //////// define the control signals/transitions
+    // each row N denotes the drive currents at clock cycle N.
+    // each col M denotes the drive current at core M.
+    // let drive_map = drive_map_5_core_inv(ClockState::HoldLow, ClockState::ReleaseLow);
+    let drive_map = drive_map_isolated_inv();
     let num_cycles = drive_map.len() as u32;
     let num_cores = drive_map[0].len() as u32;
     let mut core_drivers = vec![Vec::default(); num_cores as usize];
@@ -253,7 +280,7 @@ fn main() {
             ModulatedVectorField::new(v_field, time_varying.scaled(amp.cast::<R>()))
         })
         .collect();
-    assert_eq!(stim.len(), 5);
+    assert_eq!(stim.len(), num_cores as usize);
 
 
     let wire_mat = IsomorphicConductor::new(1e6f32.cast::<R>());
@@ -306,7 +333,7 @@ fn main() {
     }
 
 
-    let duration = Seconds(params.clock_phase_duration * (num_cycles + 3) as f32);
+    let duration = Seconds(params.clock_phase_duration * num_cycles as f32);
 
     // let stim = DynStimuli::from_vec(stim.map(MapIntoBoxStimulus).into_vec());
     let mut driver = driver.with_modulated_stimulus();
@@ -314,12 +341,13 @@ fn main() {
         driver.add_stimulus(s);
     }
 
-    let prefix = "out/applications/multi_core_inverter/23-4ns-1e7A/";
+    let prefix = "out/applications/multi_core_inverter/26-40ns-6ns-1e7A/";
     let _ = std::fs::create_dir_all(&prefix);
-    driver.add_state_file(&*format!("{}state.bc", prefix), 6400);
-    driver.add_serializer_renderer(&*format!("{}frame-", prefix), 6400, None);
+    driver.add_state_file(&*format!("{}state.bc", prefix), 25600);
+    // driver.add_serializer_renderer(&*format!("{}frame-", prefix), 6400, None);
     // driver.add_csv_renderer(&*format!("{}meas-detailed.csv", prefix), 100, None);
-    driver.add_csv_renderer(&*format!("{}meas.csv", prefix), 800, None);
+    driver.add_csv_renderer(&*format!("{}meas.csv", prefix), 1600, None);
+    driver.add_csv_renderer(&*format!("{}meas-sparse.csv", prefix), 12800, None);
     driver.set_steps_per_stimulus(200);
 
     driver.step_until(duration);