This is roughly how far it needed pushing, again not the best pictures but you get the general idea.
line set as a guide so I could match both sides, again thanks to David for the advice
set up of the press, had to make up a wooden plate to give an even push.
And finally it pushed out, again not a great picture, then did the same on the other side and welded it up which was by far the hardest part to be honest.
Yep, rather sad looking mk1 in the background, but that my mates and he'll get round to it one day, will update again soon.