Scx30 Trailer Hitch Mod

I loved Blake Smith's design for the scx30 trailer, but I had one problem, I couldn't attach it well and I wanted to make it swivel like and actual offroad trailer. I designed the hitch mod to work with the standard scale at 100% but when I printed it, I decided to make it 130% and change the length a bit to make bigger and shorter. I used some 1.2x8mm (I think) screws on the hitch links and a 2x12mm screw through the actual hitch receiver because it is so small. Please comment your thoughts on this or other designs you want for the scx30, the feedback helps me with future models.