Thanks for your last post,Joe. In my mind, I'm working along lines of thought that I guess are now out of date. I need help! Please!
I know that the arrow gets bent by the energy from the string at launch and inertia holds back the front( I assume that's still correct)
I have imagined the tuning exercise was to try to select the best spined arrows if possible and work from there. If the arrows were less than best spined, then things could still be done to get the best from them.
Using bare shafts would allow the up and down to be optimised so the arrow wasn't diving or soaring. ( I think I can see that as airflow or angle of attack)
Left to right tuning,using arrow rest position and button pressure on recurves, I imagined was a means of optimising the bending of the shaft to create a situation where the arrow was travelling in a direction that, I would call "straight ahead." Again, I imagine this as the arrow is travelling in a direction that is as near straight(viewed from above) as possible and with as little bend in the shaft as possible.
I have been believing that with compounds the release aid puts the string forces into the arrow in a way that creates vertical bending when the point is held back by inertia. This, makes me think that nocking point position is not only responsible for reducing the diving or soaring but is effected by the spine at the same time in the same plane. Is that why compound rests are sprung in the vertical direction?
Thanks for listening
Geoff