You know what would be really useful? A video of someone doing the same technique with IP and without IP. A person could observe the differences and get some idea of where they come from. Is it possible to do the same exact technique with and without IP? I'm guessing adding IP would also change the technique. Anyway, I'm talking about stuff I don't understand, so I'll shut up.
Dan is in the Seattle area 3 or four times a year...he has been at George Ledyeard's dojo any number of times. Just go down and take part....saves the video production and crew costs......and it is real time with you feeling the differences.