diff --git a/crates/applications/stacked_cores/scripts/stacked_cores_40xx_db.py b/crates/applications/stacked_cores/scripts/stacked_cores_40xx_db.py
index cd8d5a2..0793bb7 100755
--- a/crates/applications/stacked_cores/scripts/stacked_cores_40xx_db.py
+++ b/crates/applications/stacked_cores/scripts/stacked_cores_40xx_db.py
@@ -199,6 +199,7 @@ sims = [
     (SimParams42(2,  6, 400,  "30000001024e0"), None, 20000),  # 3e10
     (SimParams42(2,  6, 400,  "4e10"), None, 20000),
     (SimParams42(2,  6, 400,  "8e10"), None, 20000),
+    (SimParams42(2,  6, 400,  "149999992832e0"), None, 20000), # 15e10
 ]
 
 measurements = { real.machine_name: [human, norm, None, None] for (real, human, norm) in sims }
@@ -2497,8 +2498,15 @@ Piecewise(
         [   4334, -16371 ],  # -0.07
         [   6003, -16518 ],  # -0.06
         [   7627, -16656 ],  # -0.05
+        [   9154, -16725 ],  # -0.04
+        [   9894, -16735 ],  # -0.03
+        [  10353, -16739 ],  # -0.02
+        [  10726, -16742 ],  # -0.01
         [  11029, -16744 ],  # 0.0
+        [  11290, -16744 ],  # 0.01
+        [  11529, -16745 ],  # 0.02
         [  12176, -16749 ],  # 0.05
+        [  12523, -16752 ],  # 0.07
         [  13010, -16755 ],  # 0.1
         [  13809, -16759 ],  # 0.15
         [  15012, -16765 ],  # 0.2
@@ -2747,8 +2755,15 @@ Piecewise(
         [   6705, -16287 ],  # -0.02
         [   7334, -16284 ],  # -0.01
         [   7857, -16284 ],  # 0.0
+        [   8323, -16286 ],  # 0.01
         [   8752, -16290 ],  # 0.02
+        [   9162, -16297 ],  # 0.03
+        [   9564, -16302 ],  # 0.04
         [   9967, -16308 ],  # 0.05
+        [  10385, -16317 ],  # 0.06
+        [  10832, -16326 ],  # 0.07
+        [  11340, -16337 ],  # 0.08
+        [  11960, -16356 ],  # 0.09
         [  12796, -16374 ],  # 0.1
         [  16586, -16472 ],  # 0.15
         [  16776, -16478 ],  # 0.2
@@ -2876,8 +2891,20 @@ Piecewise(
         [   2269, -15522 ],  # -0.07
         [   2903, -15616 ],  # -0.06
         [   3414, -15687 ],  # -0.05
+        [   3853, -15740 ],  # -0.04
+        [   4246, -15783 ],  # -0.03
+        [   4609, -15819 ],  # -0.02
+        [   4954, -15852 ],  # -0.01
         [   5285, -15884 ],  # 0.0
+        [   5604, -15914 ],  # 0.01
+        [   5914, -15942 ],  # 0.02
+        [   6218, -15969 ],  # 0.03
+        [   6515, -15995 ],  # 0.04
         [   6808, -16022 ],  # 0.05
+        [   7102, -16048 ],  # 0.06
+        [   7399, -16075 ],  # 0.07
+        [   7707, -16102 ],  # 0.08
+        [   8032, -16130 ],  # 0.09
         [   8377, -16158 ],  # 0.1
         [  10922, -16339 ],  # 0.15
         [  16062, -16479 ],  # 0.2
@@ -3062,4 +3089,34 @@ Piecewise(
 )
 """)
 
+set_meas("42-0.0004rad-2coupling-13_1_winding-149999992832e0-drive", """
+Piecewise(
+    [
+        [ -16883,  -1609 ],  # -1.0
+        [ -16756,  -1653 ],  # -0.1
+        [ -16749,  -1646 ],  # -0.09
+        [ -16741,  -1664 ],  # -0.08
+        [ -16728,  -1676 ],  # -0.07
+        [ -16693,  -1698 ],  # -0.06
+        [ -16560,  -1752 ],  # -0.05
+        [ -13841,  -2098 ],  # -0.04
+        [  -9580,  -2504 ],  # -0.03
+        [  -5486,  -2864 ],  # -0.02
+        [  -1570,  -3191 ],  # -0.01
+        [   2214,  -3372 ],  # 0.0
+        [   6023,  -3590 ],  # 0.01
+        [   9862,  -3706 ],  # 0.02
+        [  13696,  -4160 ],  # 0.03
+        [  16173,  -4111 ],  # 0.04
+        [  16671,  -4168 ],  # 0.05
+        [  16741,  -4228 ],  # 0.06
+        [  16763,  -4267 ],  # 0.07
+        [  16773,  -4245 ],  # 0.08
+        [  16781,  -4310 ],  # 0.09
+        [  16788,  -4321 ],  # 0.1
+        [  16863,  -4281 ],  # 1.0
+    ]
+)
+""")
+
 if __name__ == '__main__': main()
diff --git a/crates/applications/stacked_cores/src/main.rs b/crates/applications/stacked_cores/src/main.rs
index 730caeb..79539c7 100644
--- a/crates/applications/stacked_cores/src/main.rs
+++ b/crates/applications/stacked_cores/src/main.rs
@@ -4261,15 +4261,39 @@ fn main() {
             .with_coupling_conductivity(5e3)
         ;
         for init_set in [
-            &[
-                // custom regions to explore
-            ][..],
             &[
                 // establish the domain/range
                  1.00,
                 -1.00,
                  0.00,
             ][..],
+            &[
+                // custom regions to explore
+                -0.10,
+                 0.10,
+                -0.05,
+                 0.05,
+                -0.02,
+                 0.02,
+                -0.07,
+                 0.07,
+                -0.01,
+                -0.02,
+                -0.03,
+                -0.04,
+                -0.06,
+                -0.07,
+                -0.08,
+                -0.09,
+                 0.01,
+                 0.02,
+                 0.03,
+                 0.04,
+                 0.06,
+                 0.07,
+                 0.08,
+                 0.09,
+            ][..],
             &[
                 // establish the slope around the most likely stable/amplifying region
                 -0.10,
@@ -4331,7 +4355,7 @@ fn main() {
             ][..],
         ] {
             for (coupling_loops, s0_loops, s_major, cur_flt) in [
-                // TODO: (2,  6, um(400),  15e10),
+                (2,  6, um(400),  15e10),
                 // TODO: (4,  3, um(400),  2e10),
 
                 // (9,  1, um(400),  5e9),  // too low slope; verified geom