I am thinking about building a trailer for a farm bike that does not involve any welding. Does anyone have any plans? We have some old bike wheels, wooden boards, bolts, etc., but the axle and connection to an old mountain bike are some stocking points that I haven't really "wrapped my head around." I was going to start something on Sketchup, but thought I'd check here to see if there are any resources out there already. We tried a couple renditions already, with some 2x4s and a wheelbarrow, and er, uh, no success.