Position of nipples just bout where we want them. The size E Dacron thread tied to aluminium guide "when" it falls inside wing all gooped up with Redux. Install went quite well, used two Shish Kebab skewers jammed in two of the small holes in aluminium guide, then gooped up with Redux and set over nipples and set in place. After aluminium tubing stuck to spar with balsa and JB KWIK we gooped some Redux onto Teflon tubing to make our Redux grommets.