Slot resonator door and rear wall question

I was curious if anyone has built a door in a slot wall. I've been scratching my head on how to utalize the closet for my mic, cable and stand storage. I am about to hit the sack and just had to post. Also, I was curious if I angled the rear wall, so it stood out on the ceiling, would I get as good results? (bottom picture). If so which of these fabrications would be best? 1 Cloth over 703 in timber frame. 2 Cloth over 703 laminated to fiber board or 3 Puffy fiberglass laminated to fiber board then compressed and cloth covered. Thanks so much for any comments Tom Sorry for my Mikey mouse drawing :P My other puter is off and takes a lifetime to turn on.

All right, couldn't sleep..... Here is a better idea. The walls in the rear corners would be kept angled to permit the door opening fully. good nite