Sorry about it; take a break until tomorrow.
Too many things to check can be overwhelming and frustrating.
http://www.dansmc.com/compression_test.htm
Yes, you will need to remove the three bolts that hold the engine and separate it from the frame in order to have room to work.
This tool should help:
http://www.harborfreight.com/12-piec...set-40349.html
I don't think that you can replace that bolt with a generic one because the step is for avoiding crushing the cover besides sealing against the neoprene washer.