MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
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I 3D printed the bottom plate. I did figure out the problem with the gear though. It was on but not quite all the way, so it was only barely touching the other gear. Guess I'll just have to shove it on harder. Yes, I am using PLA. I guess I was just a little irritated when I posted that, but now I've calmed down and fixed most of the problems. To be honest, it was a little fun figuring out how to build the car on my own instead of using instructions.

One other question though. How long is the battery supposed to last? Should I charge it after every use, or just once in a while?