Going by your description, the hesitation as proven by your diagnosis is due to an extreme lean condition. The idle jet of the dgv also regulates fuel to the progression cct also, so maybe look at upping the size of the idle jet and recheck the fual ratio again. This will fatten up the fuel delivery at slight throttle operation and off idle conditions. Secondly, check that the pump jet cct is opperating correctly, check the jet, pump diaphram and pump nozzle. They have been known to to give trouble when dirty fuel has entered the carb.certainly worth checking. The pump diaphram is located external of the carb and can be easily accessed.

cheers
benny