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 48b8846..8ae6d50 100755
--- a/crates/applications/stacked_cores/scripts/stacked_cores_40xx_db.py
+++ b/crates/applications/stacked_cores/scripts/stacked_cores_40xx_db.py
@@ -5,6 +5,11 @@ from inverter_characteristics import Piecewise
 import subprocess
 import sys
 
+# these floats can't be represented as f32, so stringify bad on the rust side
+_15e9  = "15000000512e0"
+_3e10  = "30000001024e0"
+_15e10 = "149999992832e0"
+
 class SimParams:
     def __init__(self, couplings: int, wrappings_spec: int, um: int, drive: str) -> str:
         self.couplings = couplings
@@ -181,7 +186,7 @@ sims = [
     (SimParams41(9,  1, 400,  "8e9"),  None, 20000),
     (SimParams41(9,  1, 400,  "1e10"), None, 20000),
     (SimParams41(9,  1, 400,  "12e9"), None, 20000),
-    (SimParams41(9,  1, 400,  "15000000512e0"), None, 20000),  # 15e9, but badly formatted T_T
+    (SimParams41(9,  1, 400,  _15e9),  None, 20000),
     (SimParams41(9,  1, 400,  "2e10"), None, 20000),
     (SimParams41(6,  2, 400,  "5e9"),  None, 20000),
     (SimParams41(6,  2, 400,  "1e10"), None, 20000),
@@ -219,21 +224,21 @@ sims = [
     (SimParams42(9,  1, 400,  "8e9"),  None, 20000),
     (SimParams42(9,  1, 400,  "1e10"), None, 20000),
     (SimParams42(9,  1, 400,  "12e9"), None, 20000),
-    (SimParams42(9,  1, 400,  "15000000512e0"), None, 20000),  # 15e9, but badly formatted T_T
+    (SimParams42(9,  1, 400,  _15e9),  None, 20000),
     (SimParams42(9,  1, 400,  "2e10"), None, 20000),
     (SimParams42(6,  2, 400,  "1e10"), None, 20000),
-    (SimParams42(6,  2, 400,  "15000000512e0"), None, 20000),  # 15e9
+    (SimParams42(6,  2, 400,  _15e9),  None, 20000),
     (SimParams42(6,  2, 400,  "2e10"), None, 20000),
-    (SimParams42(6,  2, 400,  "30000001024e0"), None, 20000),  # 3e10
+    (SimParams42(6,  2, 400,  _3e10),  None, 20000),
     (SimParams42(4,  3, 400,  "1e10"), None, 20000),
-    (SimParams42(4,  3, 400,  "15000000512e0"), None, 20000),  # 15e9
+    (SimParams42(4,  3, 400,  _15e9),  None, 20000),
     (SimParams42(4,  3, 400,  "2e10"), None, 20000),
-    (SimParams42(4,  3, 400,  "30000001024e0"), None, 20000),  # 3e10
+    (SimParams42(4,  3, 400,  _3e10),  None, 20000),
     (SimParams42(2,  6, 400,  "2e10"), None, 20000),
-    (SimParams42(2,  6, 400,  "30000001024e0"), None, 20000),  # 3e10
+    (SimParams42(2,  6, 400,  _3e10),  None, 20000),
     (SimParams42(2,  6, 400,  "4e10"), None, 20000),
     (SimParams42(2,  6, 400,  "8e10"), None, 20000),
-    (SimParams42(2,  6, 400,  "149999992832e0"), None, 20000), # 15e10
+    (SimParams42(2,  6, 400,  _15e10), None, 20000),
 
     (SimParams43(2,  3, 400,  "1e10"), None, 20000),
     (SimParams43(2,  3, 400,  "2e10"), None, 20000),
@@ -242,13 +247,13 @@ sims = [
     (SimParams43(3,  2, 400,  "5e9"),  None, 20000),
     (SimParams43(3,  2, 400,  "1e10"), None, 20000),
     (SimParams43(3,  2, 400,  "2e10"), None, 20000),
-    (SimParams43(3,  2, 400,  "30000001024e0"), None, 20000),
+    (SimParams43(3,  2, 400,  _3e10),  None, 20000),
     (SimParams43(5,  1, 400,  "2e9"),  None, 20000),
     (SimParams43(5,  1, 400,  "3e9"),  None, 20000),
     (SimParams43(5,  1, 400,  "5e9"),  None, 20000),
     (SimParams43(5,  1, 400,  "8e9"),  None, 20000),
     (SimParams43(5,  1, 400,  "1e10"), None, 20000),
-    (SimParams43(5,  1, 400,  "149999992832e0"), None, 20000), # 15e10
+    (SimParams43(5,  1, 400,  _15e10), None, 20000),
     (SimParams43(5,  1, 400,  "2e10"), None, 20000),
     (SimParams43(5,  1, 400,  "4e10"), None, 20000),
     (SimParams43(7,  1, 600,  "3e9"),  None, 20000),
@@ -257,7 +262,7 @@ sims = [
     (SimParams43(7,  1, 600,  "2e10"), None, 20000),
     (SimParams43(4,  2, 600,  "1e10"), None, 20000),
     (SimParams43(4,  2, 600,  "2e10"), None, 20000),
-    (SimParams43(4,  2, 600,  "30000001024e0"), None, 20000),  # 3e10
+    (SimParams43(4,  2, 600,  _3e10),  None, 20000),
 
     (SimParams46(5,  1, 400,  "5e9"),  None, 20000),
     (SimParams46(5,  1, 400,  "8e9"),  None, 20000),