All good points here. But the best way to do the axles and wheels is with a drill press. Chuck the axles in and polish with 600 to 2000 grit and then finally with a car wax. Do the same with the wheels. You can mount them on a small diameter screw and hold it down with the nut and then insert into drill press. But be careful, as others have said and do not change the shape of the wheel. But an important step is to get the wheel and axle kits and spin them in you hand. You will be amazed at the differences. Most places sells these in packs of 10s. I used to go through about 20 to find 4 good wheels. The last piece of advice is to take a belt sander mount it upside down in a vise, with a very well worn piece of paper in it and run the car on it for a while. Do not let the axles get hot, so you have to do it for 20sec remove, do it 20s, ect. We always had great luck with this.