just as a for fun project, I decided to make my ruffstuff D30 cover into a housing stiffener. not sure what its going to accomplish, other than being another layer of polish on an already polished turd.
this is the best way we could come up with to do it.
5/16" countersunk bolts drilled out to become 60degree tapered washers.
60* tapered countersink to the holes
11/16" counterbore on the holes to make room
1-1/4" grade 8 bolts.
the plan is to install with RTV, not a lube-locker or other gasket. the idea is to get the two surfaces to actually mate and get some clamp load out of the system. that would not be possible with a flexible gasket.
I wouldn't have bothered, but I won the ruffstuff cover in a naxja raffle, so it seemed like a fun idea.