First off, thanks for posting all this! Labor of love...
IMHO, there are one or two patterns that look real good to me, but you need some type of sighting device to center them on target. When you mention "too many gaps" in your commentary, I don't think those gaps are big enough for a fox to squeeze through, so don't be too critical...
.665 is the constriction my 26" SBE likes and looks as though yours does too. But I need a red dot to "zero in" the pattern.
This grey was a 60 yard kill with 3" #4 buck. Two pellets were complete pass throughs... 
Thanks again for taking the time to post! Very informative...
