You already know this - but I’m in the run it as is - well, maybe tune the engine a bit and toss some new plugs in 
On multiple occasions I’ve considered tossing my compression tester to make space in the drawer it’s in.I’ve hung on to it for the occasional 2 stroke boat motor, otherwise it’s fairly useless. It only tells you half the story, and usually the half you already know.
A cylinder leak down tester is a much better tool, and for those who don’t have either - I’d buy a good leak down tester and forget the compression tester. Run a leak down test on a cylinder and you can tell if you have wear and let’s you determine if it’s valve wear or ring wear, a bad head gasket or a giant hole in a piston. Knowing what’s worn let’s you fix the correct problem.
On multiple occasions I’ve considered tossing my compression tester to make space in the drawer it’s in.I’ve hung on to it for the occasional 2 stroke boat motor, otherwise it’s fairly useless. It only tells you half the story, and usually the half you already know.
A cylinder leak down tester is a much better tool, and for those who don’t have either - I’d buy a good leak down tester and forget the compression tester. Run a leak down test on a cylinder and you can tell if you have wear and let’s you determine if it’s valve wear or ring wear, a bad head gasket or a giant hole in a piston. Knowing what’s worn let’s you fix the correct problem.