after reading from page 1 to the last page 22, in my personal observation
(After going through the links and threads and looking at posted pictures and proofs)

in my opinion, joker;s psp mod is or maybe a case of a failed attempt by wet to do a dual nub mod, and my guess is, joker's psp unfortunately became a test product,

to joker, sry for u man, all the best,
to wet, hope u do the right thing bro, peace.