I have a Detech 13" Ultimate left over from a G2 i had. I use it with my F75 now and then, but if anyone has the same or similar coil but meant for F75 and wants to trade, please let me know. Mine is the white version and has coil cover.
I also have a Detech SEF butterfly 15x12 coil for F75 which I bought used a couple years back. Make me an offer for it.
Thanks.