Don't be envious when gaining a paltry 5 watts is so freaking hard for me nowdays.

It's sad when I read some of those aero testing sites and see that I might be able to equal the wattage gain from a whole block of hard training by just moving my water bottle from the lower frame to BTA =

That said, while I'm far from a speedster on the bike, I've gotten to the point of diminishing training returns such that I really notice aerodynamic changes despite insisting to myself over the past 7 years that as a front of MOPer, that training >> aero for me. I've learned the hard way that at least where I've gotten to myself now on the bike, aero speed gains can exceed my training gains. Road vs TT bike is like 4 minutes/hr. Add race wheels, another 2 min/hr. Add TT helmet, another 1 min/hr. Change from regular bike jersey to tight trisuit, another 1 min. (Put on not-that-flappy cold weather jacket, slow by 1min/hr).

Put all those together and I'll need over 40 watts of training to account for that gap between aero-TT vs road-bike nonoptimized.

I've got a new bike coming soon which should get me better aero position and I have yet to try latex tubes on race day, but that's next.