hey, that's nice work. i have built several bosals of different diameters and am still fighting twist. the lines for reference on the core that bevan speaks of are a HUGE help. i have never tried his measurement formula, but want to give it a try on the one i'm working presently. i do think the biggest key is to be very accuate and precise about how your twist is laid out in the beginning and try to keep it on track as you braid along. sometimes this tends to go to pot when yu go back through to tighten if you need to do this, so try and get it as snug as possible from the start......especially if your tying over a swell, as in this one. (maybe you already knew this) but, on the bright side, YOU built this and should be proud of what you did if you put into it your best work at the time. besides, the most important part is the feel of the noseband to your horse. if you've built the right life in it from the core on up, it will serve you well as you improve the asthetics of the item.