^Honestly, ftp is important and all, but it doesn't need to be locked down and set to one number every week. If i was that guy i would test my ftp once a month, and do the more traditional test. However, i don't normally test my ftp over the winter because i hate doing all out 20 minute efforts on the trainer, and i don't need to pin point my ftp to a set number while i'm rolling around at z1-z3. Once spring comes i test every month, and use that number for a block of training, pretty soon you'll get good at telling what your ftp is without a standard test.