Find the smallest oring you can stretch over the shaft. Probably an 8 or 9. Just guessing though. I'd have to take mine apart and test with my o-ring kit to be sure.
Assumption is the mother of all **** ups.
"Thats a lot of Romans over there." "Yes but not one of them is Gisgo." Hannibal Barca and general Gisgo before the battle of Cannae in 216 BC.