I am planning on picking up a 68/4500 flatline. If it is only filled to 3000 psi, it has the exact same functionality of a 68/3000, correct? I am only asking, as I see numerous people on the Air systems trading forum trying to trade down, as their paintball field fills only to 3000 psi. If I understand correctly, the 3000 flatline, and 4500 flatline are the same weight, the 4500 is just more expensive.