The operating pressure of the marker doesn't really make any difference in which bottle to use, that's what your front reg is for. In fact most regs work best when the pressure differential is greater than they do when it's close. Just like an Ego prefering a HP preset to a low (according to Eclipse)Originally posted by Gair333
450psi is low pressure, 850 psi is high pressuer
the proto matrix is a low pressure gat so ONLY use a low pressure reg on a bottle