I heat the nock with the hot water that others have described. But for the spreader, I use a piece of leather that is approximately an eight of an inch or a little less in thickness. To add width to the spreader I added 2 or three plies of electrician tape until I got the proper width. Takes a bit of experimenting, but once you get the right number of plies of tape, it ends up being fairly consistent. I can do about 3 or 4 arrows on the piece of leather at the same time. I think anything would work for the spreader, I only used the leather, as it was the first thing I found that was close to being the right thickness. Leave them on overnight.
Bruce
