>>1675890>What's the purpose of the brass spheres?The holes through which the paracord runs are centered in accordance with the base depth of ~19mm, so at that depth, the device stays very flat against your fingertips while under load. As the edge is made shallower by the plates, the angle of the pull shifts off-center in such a way as to turn the once-flat edge into a slight sloper. It's subtle, but at 6mm it makes a huge difference. The brass spheres allow the cord to be run in a different manner (see attached photo) which completely fixes this issue by again slightly shifting the direction the applied forces (this time in your favor). The reason for their shape is just to provide decent purchase for the cord while also remaining low-profile enough to be out of the way of the 2-finger pockets. They also serve to help prevent damage to the interior edges of the device when it inevitably gets dropped.
>Only real downside I can see is having to change out the inserts, I could imagine that being a little tiresome if someone wanted to do reps at each setting.Feels decently easy/smooth to swap them in and out currently (although I may have to loosen the tolerances a bit to account for the accumulation of chalk). My main concern is that people will lose them. Working on a very low-profile method of tethering them to the main cord when not in use so as to minimize this risk.
>I could imagine seeing these in a gym shop at around $50-70/pair.Cool. That's about what I figured the range would be. My plan is to sell them in either singles or pairs with a decent array of options. I hope to offer a bare-bones model (minus the adjustable plates and brass bits) for under $20 per piece, but this is still very much theoretical as I won't be able to accurately calculate my costs before finalizing the design.
Are you making them by hand or using a CNC?
By hand so far. I would love to have a good excuse to buy a CNC though.
