I know how you feel.....finally think I have solved the problem for me anyway.......bought silamide thread type a....from beadwrangler....thanks to tip from here...thread is very thin and almost invisible when stitched into hexies......go to sue Davy's YouTube tute....great info there....also a few more sites available...just click, watch, and see what works for you. I use a combo of the way sue daly sews together and also Mickey Depre's ...she sort of holds the hexies side by side and takes a whip stitch across both of them.......that seems to make it disappear like the seam of clothing.....just make sure your stitches are snug, but not super right...that will cause them to stretch and show when you open up the hexies....so far you are doing good....my salvation has been changing to that silamide thread......