Drop bars with zero reach stem

sounds like a flexibility issue.Im an inch taller, my last race bike had 59cm top tube with 100m stem, 70 degrees, bars with 180mm drop, 107mm reach. it was close to perfect. my everyday bike has a 58cm tt(62cm seat tube) with 110mm stem, current race bike has 57cm tt with 125mm stem.

an ultra short stem will make steering very sensitive

Agreed. I'm in an inch shorter and run a 57.5cm tt with 120mm stem

@singspeed - Have you ridden a road bike with drops before ?