You'd absolutely hate my front mount, Scotchmo. I drilled my frame originally, so when I fitted my shift kit last week, I had to make a slotted, spaced mount, to allow for upward adjustment of the engine along the seat tube to tension the RHS chain. It's a 2" square piece of 1/8" steel, with two holes for the original bolts and a slot for my long one. (An 8mm x 90mm high-tensile bolt.) To adjust, I back off the mounting nut, do the seat tube adjustment, then add washers, allow the bolt to slide in the slot and re-tighten. There are 3 layers of thin rubber in the equation and small 1/8" curved steel reinforcing plates each side of the alloy downtube, but still...
I won't mention how hard it is to add washers right now. I had planned to use a wedge-shaped piece of nylon from a cutting board, with a slot, so that I could slide it in to take up slack, but there wasn't room.
One advantage, though - it's in exactly the right place for my muffler strap, so when the engine mount is tight, I can slide on the strap with a pair of washers and tighten another nut, with Permatex Blue to lock the thread.
I just uploaded some pics of the mount in the my 'My Rides' album on my profile page.
Also added pics of the whole bike with the new shift kit, 3L tank, centre-stand for kick-starting, etc a few days ago.
... Steve
Here's one shot of the mount:-