So I’ve tried them in multiple drive cups. I know the front shaft has a darker color meant for the front cup. On the rear it’s really tight to slide into the cup. To the point I would have to force it in there. Front has the issue also but not as bad. Using a Joe Diaz spool. Also tried M2C cups and I have Scorched cups on the car already. Same thing. Any tips? Something I’m overlooking?