I have one too. They have a copper 510 connector which is quite soft and will wear out quickly if you don't take it easy on them. Taking it easy on them means you don't screw atties on too tight and you are careful not to cross
thread them. Not changing atties too often will also help a lot
If mine ever wears out I will install a
Fat Daddy 510 connector, but I know how to solder and do the mechanical work needed. If you can handle that it's the best way to go IMO. The FD 510 connector is a lot tougher and will last
a lot longer than the original. If you have any doubts that you an replace it, don't try it. Safety is the most important thing here as always.
If I couldn't do that job and I liked the mod, I would buy another mod with the same features that has a better 510 connector.