By now I've gotten a drill press, disc sander and band saw to cut any AL I need to tap and drill. I need all this stuff so I can not just fabricate parts out of stock material when I need it. I ordered several feet of aluminum to cut out the coffins.
Final assembly. Painted with primer all the holes cut out and sanded with the top plate screwed together and ready for the final deal.
I drilled and tapped holes for each of the 3 coffins that hold the COMM8 pistons. That took a while but the end result was worth it.
The sub head plate is installed with nylon washers. Then I bondoed over the screws on the head and the side coffins. You'll sand this down after it drys and it hides the screws.