RE: x-coat drawback
What Mark mentioned was something we found while working on his friend's bow. I could feel a funny 'drag' or 'catching' of something in the draw cycle. After some investigation, we found that the "X-coat" had actually broken right under the slide.
There was no way to properly repair that area, so we removed it.
I look at it much like Mark described - a "washboard" effect. It is much like running your slide across monofilament center serving. First time I've seen it happen so I'm not condemning it. It is, however, something that has to be considered. Heavily waxing the area under the slide would be my recommendation to possibly help prevent this occurrence.