I did the same, the Ultem cap is especially tight with 2 o-rings. Have had zero issues with a single o-ring (I kept the top one).@n0ugh7_zw, first thing I do with atty's that have dual cap o-ring's is remove one of them. Two is over kill on the Hadaly, same as with many others atty's. Even with just one o-ring I get no leaking at all, and removing/installing the SS cap is far easier. When my accessory delrin/acylic/ultem caps get here that are suppose to be even tighter than the SS cap, using just should make them far easier as well. I lube my o-rings with PG.