Staind RC Tank Option Parts M1.0 Gear Spacer Bearing

Alright, below parts may be able to help you while printing Staind RC Tank from link below,
https://www.thingiverse.com/thing:2414983

*1. M1.0 14T Pinion gear
- this type of Pinion is verrrrry hard to find that can fit 3.17mm motor shaft, if you are using normal 2212 motor that you have laying around such as below, https://www.banggood.com/Wholesale-XXD-A2212-KV1000-Brushless-Motor-H363-For-RC-Airplane-Quadcopter-p-57432.html?p=DG23031123036201501P

I've printed multiple samples and the