Re: Whip finisher destroying my thread.
70 denier polyester thread breaks at 13 -15 oz tension. I think your whip finisher may be scored. You can also change to a bonded thread that is less likely to fray like Uni 8/0 that is a bonded 72 denier polyester threat that breaks at 15 oz.
I would toss the cheap whip finisher and:
1. Get a Matarelli style whip finisher.
4. I use 5 turns. If you use 2/3 turns, place them back to back.
"Discovery consists of seeing what everybody has seen and thinking what nobody has thought"..........Szent-Gyorgy