thanks, this is all helpful. I found through a few different evaluations of the info I was getting, a range of R, that got me in the ballpark and made tuning the circuit fairly painless (if anyone considers desoldering and resoldering 0603 smt's painless). I'm hoping to measure the total Q of the network and antenna now, using the nano, is this basically done setting logmag display on channel 1, hooking up the matched network and antenna to channel 1, and putting a small coil on channel 2, putting them in proximity and measuring the falloff rate of channel 1 from the maximum amplitude?
