metal lego engine flywheel

WARNING, DO NOT GO OVER 10K RPM, or they will explode. so, i designed these a while ago and they hold up pretty great, they work by adding M10 nuts to the holes, dont worry about the nuts flying out because they are tight. so tight infact that you likely need a vice to press them in, if you dont have one use a hammer. print settings dont really matter as long as you have a high infill density, less infill makes more boom boom. i personally reccomend the 6 nut wheel for a nice, heavy wheel but do whatever you want. i also added a M10 imitation nut file, with this you can make your own ones, (with three nuts, three-hundred nuts you name it)