yea 1mm is fine its just trying to make it nice and ridged and reliable really without getting to complicated or expensive to manufacture. I think if I just go with two axis the wheels would be fine, I could maybe turn some on the lathe if I wanted I guess not sure if I its worth it. I'm going to look into some bright steel strip to see what lengths I could get that in maybe to see if that would be a option for running some skates down.