Mumbles, thanks for your reply and info. I dug thru my box of aluminum and found a short piece of
round stock just a hair bigger OD than I needed. It already had a 5/8″ hole bored in the center.
I don’t have a 4 jaw chuck anyway, so offsetting wasn’t a great option.
Of course, the hole in the pump housing and puck don’t line up 100%, it appears that the
driveshaft will still have clearance.
None of my stock O-rings will fit the pump housings, so hoping the ones I ordered will work…..
if they ever show up. Worse comes to worse, I’ll try some o-ring spaghetti seal and super glue.
Prepare to be boarded!