The 1.75 gap is between the discs, once I add a 1/2" magnet to each disc, and a 1/2" thick coil between the magnets, there is only 1/8" gap between the magnets and the coil on both sides.
How thick should the discs be for magnets like these?
And finally, that coil template, my coils currently do have a 1" wide center, which this template shows at the narrow end, so how could that fit more? Perhaps I was off with the 1/2" coil legs, I will re-measure the current ones, and also try to make a coil like this.
For a coil as described, in this shape, 1/2" thick, what gauge wire should I use?