Just drilled mine and got it all buttoned up a few moments ago.
Here's the thing.... the L diaphragm was torn at the lip in one spot when I removed the cover. AHHHHHH - PITA!!!
The L carb is tricky with all those little hoses routed over and around it.
I think this was from when I shimmed many months ago, but it is interesting that I didn't notice. I wonder if it was sealed just enough that it didn't matter (it was deformed slightly and sticking out the side. I didn't use the grease trick that first time I removed the covers, but you better believe I did today.
I'm so ticked.... I'm going to start her up and try a test run in a few minutes, before the rain comes.