Andy - I posted further up the thread and don't want to hijaack yours, but when you're ready to introduce real-time form coaching to your customers, reach out to me at asensei.

Our (app)arel technology and connected coaching platform allows you to provide real-time coaching and correction on technique and form (in any sport) but specifically in rowing.

Good luck with the launch! Founder to founder, it's no small feat bringing a hardware product to market!