Don't the KB45 use a 6mm shaft. Where can you get pinions for those? This is the KB45 isn't it?
https://www.unitedhobbies.com/UNITED...idProduct=4937
Savage: FLM Conversion, 6s, MMM, CC 1520.
Mini-T Pro: Micro Pro 6800kv, Lipo, HS-81mg, Dirt Hawgs
M18MT: Quark 33A, Y22S 6000kv, FP 2s Lipo
LRP S8-BX: RC-M Conversion, Tekin RX8 B1600KV, 6S.