I bought a HF compression tester and my overall impression is that it is junk. Not worth $25.00

I am making a SUPER HIGH quality compression tester by taking the lower half of a fuel injector body, treading a bolt in it that had a hole drilled thru the bolt (bolt goes into the lower half and the lower half as threads on the inside of it) and NPT threaded the hole in the bolt. Then, simple hose with a GOOD Gauge. I guess the above sounds super confusing. I will get my pictures out there soon.

I am shopping for Gauge right now since that is the real meat and potatoes of the tool.

Any interest out there in buying the injector body part of the compressoin tester ???