Fenix Lego - Whats possible with the new ones

I've got the following

L1D Body
P2D Body with Q5
L2D Body with Vanilla Cree

Now as far as I know I can juggle heads and Tailcaps (switches) however I fancy with what I have, however I'm thinking about buying an LD10 or PD20 what I need to know is are the heads and tailcaps going to be interchangable between the three up top there and the new LD10 or PD20.

Now I know folk will say this has been answered before however all the stuff I found searching the site was just before release or just after and there has been no definitive answer I can find. Some have said heads but not tailcaps and others that Lighthound said the threads were different and nothing was interchangable.

So, people with the knowledge....enlighten me (sorry )

Squidy

Any head/tailcap you currently have may be used with any body. In addition, if you add an LD10/20 or PD20, those heads will also be compatible with your existing bodies but the tailcaps will not.