Thanks for the quick response. Yes, I believe I got the averaging idea from one of your other posts! Yes it is quite slow for patches, especially with the 4096 patch charts. (My beard was not grey when I started the last one!) I figure that if I'm profiling only once every other month or so, then the longer time is a reasonable sacrifice for the accuracy. Besides, I can always stretch canvas while waiting ...
Another thought that is related, if I increase the accuracy setting in the configuration file, I know it will slow the row read down, but might it be a happy compromise?
Thank you to you, Andy and the rest of the merry pirates on this forum for all the help. It is greatly appreciated!