Compression tests for rings is a waste unless the rings are basically missing. Leak down test is the gold standard test for cylinder sealing. There has been a lot of talk about
oil consumption and overly stroked motors because of the piston pin/ring proximity. I won't go there. Do the leak down test first, then look at other things.
Also, I would be slow to think about massaging the AFR heads. They are awfully good out of the box and unless you very good you could be going in the wrong direction.
Tony R had a problem with cylinder wall wash out due to his fat injection set up too.