I saw a video of the K&S coiler. The problem I see with it is as you coil the wire it has to go up and over the stationary piece. Then you get coils as pictured in post #1. You need a coiler where the wire just slides over itself as you form the coils. Plus you have to keep the wire from moving as you coil. Not an expert at this just my opinion.
Homemade tail wheel.