T25 PROJECT
PASSENGER SEAT
Now the plywood disk should be 1/2inch thick with a radius of 10 inches, with a hole in the middle the same size as your two metal plates.

On the outside of your wood disk you want to drill 8 holes just a little bit larger than the ballbearings that you are going to use from an old c/v joint, because all the wooden disk does is hold the ballbearings in place while the two metal plates turn on them.
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