Another comment about fit that I expect most know is that it should be tested with power at what you want to do.
One fit is not best for everything.
Your position might vary a bit based on the power you put out. It also might vary a bit based on how fast you want to go.
A static fit may get you the best for power, but not the best for speed. Then the fastest may be too fatiguing.
The rather obvious point is fit to what you need to do.