But then all you would need to do is keep feeding it stones and keep using memory fragments to repair durability until it pops PEN. If you use the system you just explained, everyone would be running around in full PEN in a few months. What would be the point of that system? Now, if you want to make it so TRI/TET/PEN have an enhancement timer of 1day/7days/14days per attempt and a low random chance to downgrade I can see the point of that a lot more. You fail, you have to wait 1day/7days/14days before you can make another attempt, and there is a (fair) low chance of downgrading and it's not automatic like it currently is.