Hello, I'm trying to go ultralite as possible. But I use rei 1 person quarter dome tent, I need to stay double walled. I have a ground sheet which weights 3 1/2 ounces. I use a full length ridge rest and was wondering why not just put the ridge rest under the tent instead of inside of it? I see 3 1/2 more ounces saved for free? Any reason not to do this? Thanks for you thoughts