Rodin Coil Frame

This is a Rodin coil frame I designed after watching a Marko Rodin seminar. It was modeled after the winding pattern he had on the board. There are numbered grooves in the toroid to hold the wires for an easier time wrapping.It is comprised of 2 channels with the following winding pattern:
A: 1,16,31,10,25,4,19,34,13,28,7,22,1...
B: 2,17,32,11,26,5,20,35,14,29,8,23,2..
it works well with 24 winds per channel
Channels A and B are wound 180* out of phase. So when you finish channel A, start B