Had to think of a way forthe Litz's to be bonded to a former to not allow flexxing of the coil, and keep the coil stationary without bulges.
Used the jig from before with a plain 1.5' PVC ring. The good news is this is scalable. I can use thicker or thinner rings as required, and longer lengths too; as long as the ring allows a small space at the inside of the 'X' cutouts for zipties to pass through:
So it's very similar to the last pair I tried, except these are a better implementation and won't flex:
I later dipped them in gloss polyurethane- twice. Since I hung them to dry by the leads, I had to redip and use the other lead to get the flow consistent through the windings. It is definitely not going to move now! Hardened and in place as required.
I want to get some 3" PVC rings cut, or maybe 3" cardboard tubing that I have a supply of, and then pot the coils in epoxy. It won't be this pair, but maybe the next one to see if it's audibly difference.