I might possibly be interested... For striking and learning flow ratios I use my Prochux, but for freestyle I've realised I need to do lots and lots of highspeed rotations for what I like... which would just rip the hell out of my Prochux cords.
I'm looking for something I can hold in top grip and spin/rotate the HELL OUT OF that's heavy too.. I'd prefer U swivel, but cord would be good if I can replace it myself... maybe these would work?