I remembered that I ordered some of the correct fibre washers from DragAnfly a few years ago part# 67-1709, but they sent me wrong ones...
Yo Bill I was assuming it was the early Swing arm type, same as Plunger and maybe Longstroke..?
Richard, I went ahead and cut the 'O' ring grooves in level and drain screws (took about two minutes), then remembered why I didn't bother to do it before- is because the drain screw doesn't sit deep enough in the hole so I hand countersunk it, will do it properly and a bit deeper to accommodate an 'O' ring, on a drill press next time the cover is off.
The level screw well is ok, so should suit so long as the counterbore is smooth enough (mine has not apparently been leaking, but did it anyway and left the fibre washer in there)
Pasted a pic of the inside of the spare (Plunger type) cover- would've been a good one except for a few battle wounds. Funny thing is, it only has a cutaway for the level , not the drain- that must be on the inner....never noticed...?