I've only had this pump 2 days and pumped my 2900 psi/20 mpa gun up from partial charge twice, but so far, it's great. Was easy enough to mount the handle and the gauge. I made sure all fasteners and fittings were tightened securely and lubed the barrel with 3 drops of pure silicone oil and added a couple drops into the air intake hole at the top before attaching the handle. Experienced no leakage, binding or scraping. Took 32 pumps to top off at 2900 psi from 1000 psi. The barrel was barely warm to the touch. For what I paid compared to \"name brand\" and if it holds up, I consider this pump a tremendous value. It comes with 2 sets of overhaul seals etc.. It also includes a stamped metal wrench for all sizes required, but I have \"real\" wrenches which I trust to hold without slipping. I'm sure it would be fine in a pinch. I'm only 155 lbs and glad I only have to pump up to 2900 psi. I think you would have to weigh 185 to get to 3500 psi.