HF leakdown test is a Piece of Big Steenkeeng SHTUFF but here is

Today's "minor improvement" I dug through some of my old HVAC stuff and came up with no less than 5 low side gauges, one of which the needle is fallen off, but could be reglued. I checked them all against the refer gauge on the tester and found one that exactly matched pressure between about 60 and 100. "Last improvement," lol Also the engine head hose for this thing makes a GREAT air fitting to bust stuck heads loose!!1