[I used the mill's indexing head to measure the angles. But apparently not every home has a mill. No matter, I have an easy low-tech way to measure angles of rotation at:
http://www.mcgee-flutes.com/Angle%20measurement.htm[/quote]
Terry, I feel sure my home should have a mill, but I can't seem to find it at the moment.
I measured my angles, roughly, using your method. Alone at the time, so I couldn't figure it from top level, but from the centre line of the toneholes (all in line), to the centre of the embouchure, I get 40 degrees. I'm not done tweaking the position, so it moves around a bit, but that's about where i am right now. i would LIKE to be able to rotate it back a little, as tone improves, but then I have trouble covering the toneholes. I think how long ones fingers are would be a factor here, along with the other variables.