Looking for ideas/parts/sources for said parts to build a reliable/repeatable setup to test my electronics. So far I have a handheld vacuum pump w/gauge, a stand alone vacuum gauge and a foodsaver. Am looking a picking up a 1 gallon widemouth canning jar and attachment for the foodsaver. Any ideas on a bleeder valve type setup to regulate vacuum? How about inches of mercury to altitude comparison #s? All I've managed so far is to make leds light up in a cobbled together rig, it allows me to see that things work but no real data. I'd like to be able to test as flown setups complete with e matches.