et voila!
two unifilar pancake coil with phi ratio hole. with all strands soldered together

single coil inductance 0.04 and 0.05 mH
series connected bifilar 0.17mH

always nice to see that inductance rise when its series connected.

Im painting the coil with epoxy resin i had left over. to fixate the windings, and add a good dielectric layer

I painted 2 layers of epoxy on each side.
now let it harden.

soaked in epoxy and now hardened.
Maybe I'll try to use these in bucking mode first. see how that works out