it's a neat idea. I'm scrogging myself and yes, it is messy as hell (though its only my first time).

I agree with whoever said to train the plants before you put under the glass. That way you would already have some nice side shoots. If you just grew it straight up then turned it sideways your side growth would be lacking and not produce as much bud. I know you want to avoid stress, but LST is really not that bad, especially if done slowly (a week or so for the initial bend).

also, a small thing, your glass will block some of the light. and i'm not sure how much buds would like growing directly into a pane of glass.

there's only one way to find out, so hurry up and try it out, i'd love to see it.