The "have" part was always tricky.
Warforged with the Psiforged feat,
get the 1pp Cog Crystal as themselves or part-of-themselves.
Blurring the line even further.
(I've had no MoE access for years)
Still, the Bonus hitpoints thingy ... you reach 0 total pp,
but dumped 1pp into the Cog Crystal during.
(1) ... You put 1pp into empty CC.
(2) ... You use all (normal+bonus) pp, as normal.
(3) ... You are at 0pp.
(4) ... You transfer 1pp from the CC.
(5) ... You reacquire psi-focus.
(6) ... You spooge* pp (again)
repeat
* spooge is a technical term, refering to the 2 feats + cheese.