Print with PETG or stronger material I had success with PETG +25% infill and 4 walls. Holds me just fine at 250 LBS. Use a 1 ½" dowel typically found in the molding section of a store. pay close attention to your screw lengths the one hole marked with the S needs to be shorter. if the socket screw fit is super tight put some candle wax on to lubricate.