Just a thought on the reason for a single low compression number. Run the compression test multiple times as sometimes a speck of carbon can get between a seat and valve. We found this on John Corbani's car when we went to Santa Barbara to view it for a PPI. It stumped us. Then we performed the compression test several times and it cleared with the cylinder number returning to be in line.
Just a thought
05702 had this too
It seems that many have this shit, I wonder where it came from