Hi guys, haven't thrown in my two bob for a while- there's a couple different issues going on here.
1, (original question) Jeff, are you certain that you have the correct plain shim 67-0061 on the end of the rocker shaft (R/H internal)?
When I pulled mine apart I found a couple of bodgy hardware washers the wrong size in there, they need to be the correct I.D.,and O.d I think is also critical- maybe 3/8" x3/4"(?).
If it is /they are missing, the rocker shaft won't be held firm against the inside of the box, and could spin thereby nuts loosening- just a thought...?
2, (Kiwi)I don't think it matters a lot how much protrudes from the LHS, so long as the washers have something to hang on as with care the banjo's will self centre...?
3, re RGS Bills idea, not bad, I think I've used a similar idea somewhere, but in this case as per the other thread (no pun intended) re "sump-plate', and other applications where threads are susceptible to wear, one could instead utilize a socket tip grub screw in place of the full blown cap screws, thereby negating the need to undo the screws, just undo the nuts. (kinda like a tappet adjuster screw), but I think the original studs be better as they have the fine thread for the nuts, for better controlled tightening and resistance to vibrating loose. (having said that, I have SS socket cap screws with spring washers- for now).
Hoo Boy phew, hard yakka that, need a (whoops,nutha)bevvie now...good luck with it... cheers duTch