Spark plug reading

So used my DIY leakdown tester. My gauges aren't reading the same(scale off, accuracy minimal?) BUT the cyl psi reads higher than incoming. Very MINIMAL can be heard thru oil fill stovepipe on ds. Everything else nada. Psi also stays consistent and doesn't drop in the cylinder. #7 is at tdc compression.
Compression on 7 was 155 dry, 164 wet.
When doing compression chk, it took quite a few cranks to build psi in all of them(8-10 revs minimum)
Here's video of leakdown.
Thanks all :thumbsup: