Don,
Do give a release a try. I do prefer using a simple non-mechanical release, especially when shooting very light spine arrows.
I did have an interesting experience shooting Broadhead flight this last year. We are allowed to use a non-mechanical release with the modern recurve Broadhead event, so I shot three arrows with a finger release, and three arrows with a simple hook&loop release. I took my time drawing back with the back side of the Broadhead touching off on the back of the bow to set the draw length. I noticed the finger release arrows were kicking off to the side and I thought these shots were going to give terrible results. The arrows shot with a release appeared to leave the bow much cleaner without any side-to-side wag. To my surprise, the longest shots were the arrows shot with the finger release! How this happened is a mystery to me.
I usually have opposite results where the arrows shot with the release do better, although this was usually with light flight arrows.
Alan