Some time ago I ordered 4 non-reconditioned Pepsi kegs from Morebeer. For one of them (the only one with blue handles, if this matters) I have to use considerable force to get the ball lock adapters on and off. And yes I'm putting them onto the correct terminal. For the gas-in terminal, this even ruined the o-ring.
Are there slight differences in the sizes of the gas and bev terminals possible? What can I do ?