BTW, I am diving into this project this weekend, and if anyone has any helpful hints or tips for me I'd really appreciate it.
I'm gonna use Great Stuff window/door foam to fill the hole that will be dug out for the copper pipe, but I'm uncertain about what type of adhesive or glue to stick the top to the wood, and the wood to the foam.
What have you used, or what would be best in your opinion?
FWIW, I already got the top off, it was kind of a PIA. Once you get it started it goes easy, but getting that first corner up is a challenge (at least it was for me).
TIP:
(If I'm not mistaken someone else here mentioned starting at the back, and I agree, start at one of the back corners.) Be aware there are two small plastic tabs that clip the top to the front of the fridge, I didn't know they were there until after I got the top off, but I snapped them off, if you are careful in the way you remove the top you can probably save those two little clips in the front (not that it matters much because everything will be glued back down). However, it seems like they would add a little rigidity to the top in not allowing it to pull away from the fridge in the front where the plastic ledge hangs over the door.
I'll be sure to post a finished pic when I'm done, and let everyone know how it goes!