Hello! We managed to get one wheel on and it was a very tight fit but the other snapped. That's my bad. Looking at the square hole, it doesn't appear to be completely cut? The washers were all mishappen as well and were all curved instead of straight. We are planning to just continue building with what we got but it doesn't feel flush with all the warped washers. Are they all supposed to be curved like pringles chips? Lol! Is there a way I can order replacement parts? Thanks in advance!