Bo, only issue I ran into was where the trailer 'tongue' goes thru the trailer/chassis 'body'. when assembled, the tongue should slide in and out of the 'chassis'. make sure before paint that it will slide in and out easily, and factor in paint thickness. I sanded the tongue quite a bit, and after the chassis was glued together, I filed the 'tube' the tongue goes thru for a smooth slide. hope that makes sense. aside from that, it was pretty straight forward. also, the 'bunk' arms [uprights]can either be glued stationary, or allowed to move. the bunks themselves can be put together to turn as well, so everything would turn if you were taking a corner.