What do you mean by long distance? You mean, ordering from a builder without being fit in person by the builder?

Yes, I have, but I wouldn't do it unless you have a builder with years of fitting experience, a top notch local fitter and a very clear idea of what position makes you happy.

Sounds like you have far too much weight forward on your bike which could be a number of problems. What do you do for core strength? Just asking as it is one of the cheapest routes for alleviation.