Hey GMTA = Great Minds Think A Like on the tomato cages. So one suggestion or something I guess I am going to have to do is to put the cage up on some 2 x 4's the length wise to raise it up a bit as our heating pad wraps farther on the sides than the frame is wide. If all of that makes sense?! I would not cut off so much initially when you go to make it like a tunnel. I would leave more metal so the frame sits up a bit. Makes me want to re-do mine. Anyway, ours seems to like it. I do gentle reminders about putting them in the cave where it is warmest. I will do the same lights out routine while they are in the house, hoping they get it by the time they are outside next week with natural light. Good luck and post pictures of course!