This is what I use. The working nipple just threads onto the few remaining threads. (BTW, this is not my idea - can't recall where I saw this - one of the wheelbuildling books?). This gives good purchase. Easy to twirl the eccentrically bent spoke down. Easy to remove the tool and move onto the next one. Commercially, hard to beat the old VAR version of a Yankee Screwdriver, with a spoke tip (screwdriver with a nub) on the end.
