Are there other reasons than the position of your rest or nock that cause fishtailing ? I seem to have some arrows fishtailing and others that don't.
I shoot straight fletched and offset fletched arrows and sometimes they fishtail, sometimes they don't.
I thought it might be an arrow with bad fletching or something, but it's not the arrows....
....
I am shooting a tomkat 54#, DL 28.5 and a fuse WB which I aligned using Easton's tuning guide.

F.