Originally Posted by
FBinNY
Yes, but only on hubs where the shell is made in 3 pieces (flanges pressed on the center section). I've never seen it on a one piece machined aluminum shell.
I've encountered a couple of gearhubs with one flange on a spline. Shimano Alfine 8 speed is one of those (Non drive side). Sachs S7 coaster brake (steel shell) is another(Drive side.). With these hubs, it could conceivably be possible to remove the flange and re-install it with the wrong spoke hole orientation.
Th OP didn't mention which dynohub he has, but this may be a possibility.
In both cases, I discovered this by accident while setting spoke head washers.
Here's the Alfine, showing the separation of the flange. I got on the horn to Shimano as soon as I noticed this happening, and was told not to worry, that flange is removeable.
