Heads up to those trying this design out: The parts do not connect with smooth edges, but otherwise things come together.
I see now that one could see it in the picture, but it was a surprise when trying to mate the spool's arms and hub. It's good to know it's as intended though.
So far it's looking good, and I can't wait to finish printing the parts so I can dual-extrude from coils!
P.S. It took using a vise to ge
t the arms into place, they're definitely not going to wiggle!