Learned I need to tip my bars further up to straiten out my wrist which started to hurt from all the steep climbs.
I found that I needed to rotate my handlebars a few degrees downward due to left wrist pain after six months of hard riding. It seems that this is a critical adjustment I wasn't aware of until I experienced a little pain, which led me to notice that my wrists were not completely straight. This should probably be the last tiny adjustment to re-check after getting the seat, seat pad, neck rest, crank arms, Q-rings, pedals, and boom all adjusted correctly.
I imagine that someday, a recumbent cyclist will be able to go to a local bike shop and get a complete Vendetta (or other model) bike fit just as can be done today for a DF. The fit specialist would use a goniometer to get the leg angle correct; get the crank arm length tuned in exactly; suggest the right size and type of elliptical chain rings; mount the seat and seat angle just right; get the neck rest tuned in perfectly; make suggestions for becoming more aerodynamic; suggest tire/tube options for low rolling resistance; measure resistance of wheel bearings, pedal bearings, and bottom bracket bearing so as to make drive train resistance improvements; suggest type of chain and chain lube; etc. Basically, all the things I have had to learn through the forum, research, and through trial and error. I enjoy working on my own bike, and I enjoy riding it more.
But not everyone wants to be an amateur bike mechanic (hard to believe!). I know a guy who is as powerful as a freight train on a DF, but he has to take his bike to the LBS to change a tube because he doesn't know how and has no inherent mechanical skill or desire. On one ride, his rear derailleur was skipping a little and causing him to have shifting problems. Then the next week on a ride, it was still skipping. He said he hadn't had time to take it in to the LBS. I couldn't stand to listen to it anymore, so I asked him to stop at the next stop sign and hold his bike off the ground. I did a little tweak to his derailleur, and after a few seconds, "Presto" no more skipping. We were both happy. The guy makes a great time trialist and a halfway decent bike stand. But he can't change a tube to save his life, or remember to remove the bikes from the roof of the car before entering the garage. Let's just say he has "preferred customer" status at the LBS.
So the recumbent bike fit service would be nice for many who become recumbent riders, without the skill or desire to become mechanics, as recumbent bicycles become the "standard" bicycles in years to come.