I would expect, with the need to keep the coil & former perfectly circular, and the coil firmly glued in place, the skill set is much more demanding. And that's with round wire. How about winding JBL-style, flat wire, edge-on? Yikes! But - somebody's doing it somewhere, recone kits are being made & that's proof enough. I'm looking forward to what our pickup winding brain trust has to say.