Thanks guys. My main concern with back-stitching is that the back side of the stitches (when back-stitching) looks like a bird nest. The needle and thread always seem to push the first stitches out a bit, then everything gets all jumbled up. The top-side of the stitches look great, but when you turn the sheath over............ Bad news.
I will do some tests based on "particle's" suggestion and see if that helps, however, I just may have to do like "TwinOaks" suggested and do the back-stitching by hand. I sure hate to do that, but if I can't get the Tippman to cooperate, I guess I will have to.
Robert