Would there be any general interest among customizers to have a list of heads that swap in with no modifcation? I'll get started on some that I know off the top of my head.

Recolors of a given mold don't count of course.

There's probably some float room in the lists too so don't take it 100% as a guarantee.

Maybe if I had calipers or something I could do measurements, but alas.

* Ball joint is on body *

- set 1
RotF/DotM Cannon Bumblebee
PCC Icepick (combiner head)
PCC Huffer/Crankcase (combiner head)
Generations Thunderwing / Sky Shadow
Universe Hound

* Ball joint is on head *

- set 1
BW/Universe Silverbolt
BM deluxe Jetstorm / Universe/RiD? Storm Jet


* Slot is on body *

- set 1
DotM deluxe Ratchet
PCC Darkstream/Skyburst (combiner head)