What do you think about opening the Amiga and installing the GVP card under the plastic hinge instead of removing it?
Do I need to worry about the bottom of the GVP card touching the metal bottom of the expansion bay?
I often leave the plastic cover off anyway. You often had to mod the lip to the cover to get it back on. The makers of these cards really tried to cram as much in. I also often open the Amiga and fit from inside. If your worried about touching the shielding with the card just run a bit of insulating tape across those circuit spots and the shielding. I have done so many mods to the cover including drilling holes in it. It will work you just need to be creative.
scuzz