Well I guess it alldepends on how the arrow is'bent'or mis-shaped as to what results you'll find. And once the fletching and glue is applied- all bets are off as to finding the heavy side of the SHAFT. Ever weigh individual vanes and compare from vane-to-vane? They can vary a lot depending on the length and the manufacturer. I know you mentioned that you removed the fletch and still got the same result- maybe that is the heavy side in your instance. Maybe it won't be on another shaft that has one heavy fletch with a lot of glue compared to the others on that shaft.

I got into a similar discussion with someone who was talking about measuring runout on shafts. Not all non-straight shafts have a gentle, consistent arc to them. Those that doare easy to find and measure because most people measure the mid-point between the supports (middle of the shaft).

I pointed out, what if your shaft is a very subtle "S" shape? If the shaft was centered on the supports and if your indicator is positioned at the middle of the shaft- you could have a hellacious s-shaped shaft, yet have almost perfect reading zero runout at the midpoint of the shaft (midpoint of the "S").

I got a blank look back at me....[8D]

Thepoint is that shaftscan possibly have the worst runout at different places on the shaft. Not necessarily the middle.