a little preview of how I mark and cut cap stones, after 14 years of experience this is quickest and easiest way to get the job done.

Step 1: place all your cap stones in the desired curve/over-hang
Step 2: leave enough room on the first and last block to have a chiseled edge
Step 3: mark every second block on both sides against the adjacent block with a level or straight bar
Step 4: repeat until the job is finished

*make sure your last few blocks leave you with enough space to end your caps with a full block, if that is not the case swap out a few previous blocks with various sizes until this is possible*

Although not seen in this clip I have proper ear protection a mask