Thanks for all the good information. Yes, there is a Aluminum heat spreader between the PCBs.

As far as the FET part numbers go, unfortunately, I just put it back together, but was able to blow up my picture and Here they are: 22N03S GAC529.
For some reason the FETs were no longer stuck to the thermal heat pad or tape or whatever it is. There is some movement to the boards inside the case, maybe due to being mounted on it's side. Can't be very good for heat transfer. I may have to do something about it.

I don't think I ripped the capacitor you were talking about. I wish I would have checked more carefully. I was planning on running it again tomorrow so, I put it back together. I will probably open it up again. When I do I will get it a picture of the other side.

It's a little scary that the Arctic Alumina Adhesive is a permanent bond.