I have been lucky enough this year with my Legato RT team mates to be part of a 3 day assessment with Body Rocket who use state of the art sensors fitted to your bike to measure your cda and assess body movement on your saddle and across the cockpit.
Results have been fabulous with some positive cda/time gains and more fundamentally for myself, allowing me to find a position that has opened up my hip flexor without any impact on cda. Here is a short video of our first test day which gives you a nice insight into how @bodyrocket system works