David G.
Works well making an Iwata trigger Like the vintage thayer and chandler a1 and the paasche ms and wold a1 37. It took a while to using higher pressure to activate spring resistance. I was using 10 to 15 psi .It works fine at 25 psi.It helps with triggering without spitting.I have only had that problem with stock Iwata air valve springs. No more clunking on the trigger when pulling back beyond half way.I bought a hp sb classic version from you in 2008 portrait class.