Advice on fitting new Click Switch?

I have bought a faulty Ipod which someone has attempted a battery replacement on. This has been done without proper dissasembly knowledge. For starters, the clickwheel has been pushed down towards the logic board.

Things are tight enough in there already.

Aside from sticking a block of something to the the clickwheel with epoxy resin, I haven't yet been able to figure out how to pull this back up.

Haven't seen any instruction on fitting a new clickwheel assembly into the Nano body yet.

This must need a lot of upward pressure from inside.(Do Appple workshops have gangs of trained termites!) Seriously, there must be a clever set of wedges with some kind of jig, to push this into place.

Would welcome comments here.