Two question: Look pedal float and pedaling out of the saddle

[Seajay]

Also be sure you're doing plenty of glute strength work - stretching the ITB area isn't going to be enough if you keep stressing it by making the thigh muscles do the butt's work.

I've read that a tight Psoas can lead to weak glutes. Thus Thigh doing the glutes work. They called it "dead butt syndrome"
Also, I've had really good luck stretching "figure 4" to get those really tight upper leg, low glutes areas.
Oakleaf or Wahine can you verify the Psoas thing and recommend any other specific stretches for Piriformis or ITB?