Frontlefthamster is quite right..
..from CJ4 to 10 or X is a BIG step! Apart from all the obvious stuff (range, weight,speeds,engine-management etc) you MUST talk to your insurers, Nomorecatering!
My guess is that, even if they approve a PPL/IR as P2, the premium will go through the roof...
Speaking personally..and no offence here... the thought of a 10 or X with a newly type-rated P1 and a PPL P2 scares the sh*t out of me!
Be totally professional my friend.