My new jig and b55 spools arrived the other day. Seemed apppropriate that the first string would be for the oak long bow I built. Brown and yellow b55 12 strand 65". After watching some videos, 1 in particular a couple times in the important spots I decided to give it a go this morning. The jig is straight forward, and easy to use. The actual winding of the string went fairly well, but I did untie it probably 4 times and redo one side and then the other having missed what I thought was going to be the ideal length before stretching. Once everything landed at about 64" I fashioned a real backwoods set up to stretch with an eye hook, scrap of metal, ratcheting tie down strap, a couple clamps, and a 2x4. Actually worked great. Stretch to 66" and let it sit for 1/2 an hour. After releasing the tension, came 1/4" under the original brace height with the commercially produced b50 continuous loop string. Added an extra 5 twists and it dropped right in place. Some serving, and couple hand cut merino wool silencers, and there was no way I wasn't going out to shoot a bit in spite of the fact we are getting 7-14 in. of snow as we speak. A little fine tuning of the tie on adjustable string nocks [thanks to someone on here who posted the video link, I forget who though] and am back to shooting nice groups at 40ft in no time!! The whole process took longer than I expected, but am super excited with the finish, and will definitely be making one for bow project I currently have underway...and probably the other bows I own. I can definitely tell a difference between the new and old materials, feel to some extent, but the sound is also slightly different. Still very quiet, but I think the tone on the new string is a slightly higher frequency.