> bearing in, and clip back together. Don't know how you opened the > ping pong ball Scalpel > but I see potential problems sealing it again so you do not loose the > ball bearing. These may help that scenario. I could epoxy or silicone a lid on it but the box I have in mind would cover the top anyway. Even slightly less than 1/2 height is too high. The b-b won't touch the lid until the whole thing is tipped over at > 70 degrees, which is not how one would park a vehicle. On purpose. I can work out the exact height with trig or a scale diagram -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist