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Eric,
I agree with you 2 cents.
Cent one - Having room for expansion would be nice. Maybe some of the extra I/Os can be routed through an opto coupler IC, so that we don't have to worry about loosing isolation when adding I/O. If we can get a PC board layout done, I'll finance getting a bunch made, so we can all start having fun!
Cent two - I like the power wheel concept, but at least as presented there is a lot of gray area. Maybe on purpose because the author doesn't want to give away his design. Where/how do you mount the capacitors. From what I understand they work in unison with the freewheel diodes to absorb the inductive kickback. The shorter the electrical path between them the lower the voltage spikes, therefore, the safer the design. The mosfets are 200V rated, so any voltage spikes have to be well below 200.
I can see a Zilla like liquid cooled design pushing over 1000 amps peak through 20 Mosfets. Same control board as Paul is working on, just different power section.
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