Injector nozzle pop tester I had built to balance and tune older-style mechanical injectors. This thing works great, and I was highly satisfied with the results: a set of injectors successfully balanced and matched at 2200 psi on the bench top before installation. Balanced injectors really do make a tremendous differrence for smoother idle! These pop testers are about $179-200 on Ebay.
$110 plus shipping to US states.
Call if interested: (214) 886-822o. Will be listing on oilburners.net, biodiesel.infopop.cc and a few other places too.