We got a vice for cheep from a reputable person, sold as leaking. 4c, lp poppet, tadao oled for an awesome price.
Tore it down to find lots of grease, gunk and junk on the ram. Fixed that, no big deal.
Tore the frame off, tons of gunk on the racetrack oring. Cleaned and ready to be greased.
Removed LPR. pulled the poppet out. Had a kick on the sealing surface. Total toast, needs replacing.
Checked the valve set screw, FINGER LOOSE!. Pulled the valve/ram sleeve and found that the cup seal was knicked where its supposed to seal. Needs replacing.
With the valve loose like that, things can get out of wack and next thing you know you have a leak down the barrel. keep that set screw snug! Blue locktight if you need too. I have never had a problem with any guns coming loose (aliens, fusions, g6r, vice etc) when i just snug them down tight. Dont go hulk strength tight but certainly snug that screw down!