Building a FG bike based around a Leader 72TS frame and S803 fork. It's a 61cm frame and I am going to run bullhorns. My current road bike is a 61cm Panasonic DX-3000 road bike from the mid 80s. This bike has a 90mm stem and drop bars, and I find if quite comfortable. I ride almost always on the top of the bars, on the brake hoods. Would a 90mm stem be a good place to start, or would I most likely want a longer or shorter stem?