Yea, if there is a way to do it without drilling holes, I'd sure like to hear it.

I had to just make the holes. Go look at my thread if you wanna know how I did it. I have a closet similar to what you are talking about. Not that deep tho. I wish it was that deep, then I could grow more plants!!! Lol. j/k

Sucks, but you can just replace the sheetrock or patch.

TGF