So it turns out that I designed the parts for this project with a NEMA 23 mounting layout. The holes in the chamber, top and bottom match NEMA 23 mounts. Not sure why I did that, other than that I knew I had a NEMA 23 motor available and I might have been worried about how small the stirrer would be if it was done for a NEMA 17. And there might not be room for the water fittings.

Then I must have started thinking that using a NEMA 23 motor for this project was like using a nuclear reactor to fy eggs; you just don't need that much power. So I spec'd a NEMA 17 motor on the parts list.

And got one.

And tried to fit it to the holes.

And noticed that that was the wrong size, but said "no worries, I'll just make an adapter plate".

And I did. Guess what? There isn't room between NEMA 17 holes and NEMA 23 holes for little things like nuts.

Well... at least not when you put the NEMA 17 motor square with the NEMA 23 holes. But now I've "got a plan": Ima make /another/ adapter plate, but this time, I'll rotate the NEMA 17 motor holes 45' from the NEMA 23 holes.

That'll do 'er, right? Solving problems with geometery.

So why not just use the NEMA 23 motor? 'cause in the mean time, I found another use for it... This is why I need to start, stay with, and finish projects in a timely manner.