With the starter kit you get a pres stone for up to 110 gear. But nobody is gonna 2200 rps to get a single stone (there's other stuff in it but still...)

The weapon enhancer is where you go. With a lower weapon (lvl 42) I was able to enhance it up to +10 before the system said it will not enhance more. I needed about 13 lvl 50 pres stones to do it. Any one of the fails would have deleted the weapon.

Also if you want to refine (down level) you start breaking at -6 here.