But frankly I think the real problem is that headwind was just messing with your head. Is your power band really so narrow that you're comfortable at 90 RPM but not comfortable at 85RPM or 95 RPM?I don't believe it is.
You're right about that. My motivation is mainly that I recently tried out straight block gearing (15-19) and I really liked the tiny jumps between gears.
I thought it might be fun to have that kind of small tweak available to me on my IGH.
**edit**
you're right about the chainring sizes. I'd need to have more like a 3 tooth difference