Thanks for the video Craig. I'm surprised that you feel the need to use so much force though. When I did some test cracks after waxing, once that weird 'slop' to the right had diminshed (I think the wax was bedding itself in), I was able to do underhand, circus and overhead cracks with about half the energy you seem to be putting in and the horizontal crack hardly needed much more than a gentle push of the handle to get a very satisfying crack.
I'd be really interested is hearing how the whip 'feels' to you; how it rolls out, the weight, balance. My aim in building whips is to have a piece that flows, that is an extension of your arm. I want my whips to need the gentlest touch to form that loop and create the crack. I feel I'm nearly there (at least I hope I am!)
Think for yourself, act for everyone.