Well, It did not go well lol.
This is actually not that badly packed. It is somewhat dense but this is really well designed. The boards can be freed from their metal case easily, and A22 (AD board) is socketed from the rest, and the LDs themselves are socketed too. Really easy to work on actually. Nothing to complain about, great job from the good fellas at HP.
Expect I wanted to reseat the chips in case of moisture but my hand slipped when doing LD110 and it badly bent a pin which broke on straightening. Meh. I guess the replacement is mandatory now. I have ordered the pair. I'll still take some measurements later but there it goes. At least the chips are easy to find on Ebay, and wasn't even crazy expensive nor far away.
