Just a quick one....
Carried the big lug out to the driveway and scraped most of the muck off it.
Pulled the covers from both sides... only had to drill one screw out... they were all pretty buggered though.
Here's one method I use sometimes. Take a flat tip screwdriver and put the edges on a bench grinder. A fine wheel and you can get pretty sharp edges on it. Disregard the "V" in it, that was for something else.
Drill down into the head just enough for the screwdriver to gain a little purchase in the hole, then hammer it down into the hole. A sharp edge will bite it's way into the hole and you can remove it. Keep in mind this doesn't work that well on stuck screws... mostly jus' those with buggered heads what won't hold a phillips tip.
If you think about it, you're only other option is to drill the head off the screw. So worst case, this don't work and you're halfway there. Chuck up a larger drill bit and finish taking' the head off.
Anyway... back to Victors lump...
Ever seen Mud Daubers build a nest inside an engine? Me neither, 'till now that is. This was inside the primary cover.
Storms incoming, so I took it into the workbench. I'll see how far I need to go into it tomorrow. Nothing definitive, but my initial impression is everything's tight.... fingers crossed.