W2D VIII - TRX-4 Hammer Sport Build Guide W2D VIII - Hybrid Hammer Sport (XR247 Axles) W2D VIII - TRX4 Hammer Sport Basic Cage Assembly (Original version) Note that the bumper is different on the TRX-4 version (this version) As I mention on Thingiverse, I highly recommend printing with TPU if you want durability. 95 shore TPU works OK when printed with high infill (mostly solid). I have a batch of Priline TPU that is objectively harder and I prefer that but I don't know where to find it anymore (last I looked). A 3D pen lets you weld parts together really easily and I highly recommend investing in one, but this cage is pretty solid assembled with screws and hot glue for the body panels. Welded, it is bullet proof. The back roof section with separate braces can be printed on a small bed printer and assembled by glue or welding. All the other parts fit on a 180x180mm build surface no problem (Kingroon KP3S). I printed my first one on my old Ender 3 and it works fine at about 2