Huey, for what it is worth, I have gotten so that I set up my geared bikes on the trainer to dial in shifting, especially after dealing with my Campy build. I could not get it to shift as smoothly as I wanted with the wheel freewheeling, and was going to seek professional help, when I decided to plop it on the trainer and do it with a loaded wheel. Ever since, I have done all of my tuning that way, Shimano and Campy alike.

I have not noticed a significant difference on the single speed, though.