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Thanks so much for this project... I love that is has both CNC and 3D printed parts. I have the car built and for the most part working and have learned a ton along the way. I am having an issue with the pinion gear and the drive gear that I was hoping to get some advice and/or a suggestion on how to fix. The pinion gear and drive gear don't touch. To make contact I put a shim in to pivot the pinion gear toward the drive gear, which works but tears up the main gear. I am wondering if I purchased the wrong pinion gear (https://www.amazon.com/gp/product/B000BQ5AYY/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1) or if this issue has been seen by others? I feel my options would be to make a slightly larger main gear or try to drill out the mounting holes and move the motor back towards the drive gear. Is the source file for the main gear available for me to make modifications? Also if I opted to drill out the mounting holes will the screws be able to hold the motor in place, or will they most likely slip?

Again, great project!