I saw your set up (love it by the way....) and the notch you have for the wheel. May do that with the loft and just put the small wheel up there when it comes and the larger wheel at the bottom.
question for ya.... do you have a lid on your cage? Does your hedgie try to get out? Roxie is a climber I have found so we had to have the lid. And this prevents the dogs from peeking in and scaring the quills off of her.