can you guys post a picture of the relief whole. I have my disco apart right now waiting for a part and it would be a perfect time to do so. Is it as simple as drilling a small hole on behind ( towards the hammer) the bottom valve screw.
Part# PSP103000 looks like what you want if you have the strong valve screws, PSP102000 would be for the 2k psi gauge for the stock disco guys. I can't find them sold anywhere else but winters. You don't have another distributor to choose from fairly close by? If not then you could always buy 3 gauges to get the order sent to you then sell the others to people on here if you didn't want to keep a spare.
increaments of 100.