how deep does the gouge go into the glass? if thats all it is then it should hopefully be fine.
from what i've been reading into the trim is siliconed and would need to be siliconed back, but with a razor blade that should be easy enough to cut out and clean up for re siliconing
DIY stuff isn't reallt hard, it can be fun to do. i love turnign things into a DIY project.
today i just brought home some 1/2" glass shelves that were in a clothing store that we are demolishing and extenting the Whole Foods that is beside it. well they ar 47" x 16" and i'm goign to turn that into a nice 50g or so reef, with just the cost of the silicone and maybe a diamond saw blade if i don't already have one kicking around at home.