The device looks like half a hypocycloidal device not the process. Maybe I am visualizing it incorrectly. Have people tried radial pinches and failed. It is hard to find out about the devices that didn’t work. It seems so much was attempted in the 60’s and 70’s and then the government just abandoned the thought process. A pitty if we have to relearn. The experienced individuals are aging and without programs a lot of that knowledge is in danger of not being passed on and being lost.