hello,
than is a little bit difficult to understend...
o will explain a little bit

this way of current loop mus be closes.
if he think to take bifilar coil
( i think , if, than an pankake coil , , in way og befilar an bifiolar as to wires.
(1. will be o inputs at aotside. the to wire insided connecte together. othes , you will try . one side outsid use an input. zhe inner wire of sam ire connecte to the second wire at otside, and use the inner side (of coil) from this 2. wire as 2. pole for input.

Try this, the rest of circuit is near equivalent to all othe desings thas was shorn
and i loced now over 6 years.

possibly ((but i dont strong belive) can it be possibel to find with teslas pancake coil
other results - because nobody have try this... (some in the inductance will not refer an be compatibel with other zylindical coils.

good look
Gustav Pese