Heater Mounting
Choose to mount the heater more substantially that threading self tapping screws into plastic. So, i got some 1/8' x 1/2" steel bar, drilled and tapped for 8 #8 screws. Drilled, tapped, and countersunk 4 #6 screws to hold the bars in place. The 8 screws were put into the bar from the back side with Locktite to keep them from backing out as the nuts are tightened. Also added a piece of bar to fill the gap instead of using a gob of silicon seal as suggested in the instructions.