ORIGINAL: Toad
Dont get me wrong guys, I am not offended that it took a different course. If I sounded rude, when I mentioned we had strayed, that was not intentional.
I wanted to see what mod's other folk do to their Norvels., compare notes, have some fun with it is all.
Take one of your engines and remove the cylinder.
Look and see how much clearance there is between the backplate and the crankpin.
If it is excessive (?) . . . mill off the back of the case so it will screw in farther and pack the case a bit.
If you go too far, or if packing turns out to hurt vice help . . . add some backplate gaskets to return to GO.