Ok, I got a go from John! These will be the conditions:
We will accept donations of $20 (no more than 3 donations per person) to send the machine for JohnM so he can experiment with it. If one day he successfully makes some tops using Don's mold, the donors would have first pick and would get a credit of $25 on the top price. It is understood that this may or may not happen, so the money should be considered a donation. In the worst case, we auction the mold among collectors, sell the machine, and any money obtained will go to the future spintop association.
You can post your donation below. There are 20 spots ($20 x 20 = $400).