It is probably the best purpose for some of the shoes I own, honestly. Awesome idea too and it looks great. So, while I may not try doing this with spaceships, I might have to see about getting some awesome things to do buildings with.
Mad? No. I think you're a genius! I was about to post on one of your previous pieces "where do you get inspiration?" but my question was just answered; guess you get it from athletic footwear. >___<