Hi, my air Venturi 90ci bottle was leaking at regulator ck ball. Couldn’t find parts so I machined it to take new pin valve, piston and seat. That seals fine now. but need to set regulator output pressure at 2900psi. Bottle rated for 4500 and regulator stamped 2900. My problem is what is the order of the Belleville washers? I ordered new ones from car lane a set of 12 .032 and set of .047 thk but not getting higher then 2000psi with the .032’s haven’t tried .047’s yet. What’s the order for 3k output?