This reminds me, there is a common belief that a Fluidampr installation may prevent crankwalk. I'm not so sure on that, but it definitely won't hurt.
Hey
@RolfG, if I find that Swedish guy that installed lower thrust washers and link him to you, maybe you can get the same work done. You, or a shop, will have to drop the gearbox anyway to replace the clutch, it's not much more work from there to pull the main cap and get it machined. If you really want a manual, I think that's the sensible thing to do in order to tune carefree.