...Granted the wheel has already been invented, but sometimes that wheel has to be made oblong to make something work a little bit better for other situations.
OK, if you want to prevent the wheel from turning, you could make it rectangular, but then I wouldn't call it a wheel any longer. (The proven best shape for a wheel is round)

...But I don't know what limitations our gent has... Would that be allowable for him???
This is exactly why we should stop guessing and wait for EDWARD to come back with some more detailed information