Well... Its no longer an untouched collectible... Had to try and make the stock work, and by God they made it difficult!
For the stock to open you need to dremel the middle bit all the way in the front. Otherwise it wont fold open. When that is done, it cant get in to the locking position.
And it wont go over the end cap!
One thing I did learn and that will probably help others, is that if you remove the two pins holding the stock in place, in the back, you can just remove the entire thing and you will have easy access to every screw in there...would havcve been nice to know, before almost pulling everything apart.
But except for some paint chippin and the 1mm i removed from the front, you cant see it was ever disassembled(its put back together now)