I just got everything hooked back up. My woodworking friend just had to bevel the outside of the mounting hole a bit. Now the speaker fits like a glove.

First impressions are very good, although I'm being careful not to overstate things. One thing I noticed immediately is how much better the reverb sounds now. It doesn't get muddy and it doesn't have that super-shrill high end that I hated so much. I played all three of my electrics through it and they all sounded great. I'm going to have to dial things in a bit. I've got the bass and mids at 3, the highs at 6 and the presence at 4. It still can be a bit much with a bridge pickup, but I'll have to try it with some gain pedals. So far: great investment.

And yes, my wife knows and no murder has occurred.