I could not get my Preon MkIII head to work with my P2 bodies. Or my P1s, for that matter. Seemingly not making contact. (a little ball of foil may fix that) However, the older Preon heads do work with the new Preon P1, MkIII bodies.
I found mine!I found the same with my samples... the threaded parts of the body tubes are different lengths comparing classic Preon and MkIII. The MkIII head does not make contact with the board when attached to the classic tube. The classic head *does* light up on the MkIII tube, but the O-ring is exposed.
My sample works fine with the Satin EN and the Satin Black. I'll check the other two . . .
Now I have a second one in shipping that has not arrived to compare this to.
Edit: I just powered up the original P2 MKII on the MKIII P1 body, and You can see the tint difference side by side, Nichia LED's are cool.
I'll upload a photo later.