Yes Elizabeth, very similar experience, I made several pairs and settled on a recipe on line here or somewhere else, who knows. I didn't notice any difference I could be confident about, either good or bad, but I spent all that time and they're not in the way, so I left them on. The recipe was some specific length with some exact dimensions of the insulation left on in bands.
I was very interested in your pen blank posts and followed closely. I had already made hard maple blocks for all of my equipment before your thread posted, so never got around to ordering more exotic woods, but I haven't forgotten.