I had stumbled upon the same write up as I have a leaky angle gear. Funny timing.
One thing I must ask. I didn’t really understand the need for the bevel on the inside of the housing. And why you would use an RTV over the Volvo aerobic(spelling?) seal that’s common place for metal to metal interfaces.
The anerobic was seeping causing the need to be resealed. The bevel allows the displaced RTV to make a bead of sealant that bridges the two parts. Loads of places on engines now have that beveled edge where bedplate goes to block, sump to bedplate, and in other places like the cylinder top cover on the Drive-E engines. The bevel applies to any angle gear you take apart that does not already have it.