I don't mind if it cost the same as another rta to replace the o rings. It's one of the best rta's in my opinion and get on with it really well considering its a clone and having spare loads o rings spare is a plus.
I have plenty of spares for the top cap, top glass and tip, it's just the bottom glass o ring I'm having issue with finding. . And yr the rounded o rings work well but why didn't they just make them flat😕 .I do find rounded ones wear and tear more easily then the flat ones though. So just to clarify @cory_m , what ones do you suggest I will have better luck with fitting the bottom glass to the base?