Hi Mark,
I am new with using JMP. Just for clarification, what is the difference between Gauge R&R value in variance components for Gauge R&R results and the %Gauge R&R=100*(RR/TV) in Gauge R&R results. Which one is considered for MSA.
When you have the report window open, select "?" tool from toolbar and highlight the part you are interested in and click it
this will open help page for you Quality and Process Methods > Variability Gauge Charts > Variability Gauge Platform Options > Gauge... which might help you answer your questions (you might have to browse other pages in Help, but this is a good start usually).
Thanks for your help.