RE: hinge removal
I removed CA hinges once and it turned out easy. I used my Great Planes Slot cutter, the one with twin oscillating blades. What I did is I fiddled with them till I got one blade on top of the hinge and the other on the bottom. In other words the plastic part of the hinge is between the oscillating blades. This does increase the size of the opening somewhat and I didn't use CA to install the new hinges. What I used is Gorilla glue (SMALL AMOUNT) to install the new hinges. Now I never use CA, just the Gorrilla Glue.
Good luck
Mark