OpenBeam Heavy Duty Coupler

I was working on an OB1.4 OpenBeam printer hardware kit for a friend and mis-cut one of the OpenBeam pieces. Since OpenBeam was having stock issues I had to fix the problem so I created this very strong OpenBeam coupler. The walls are over 8mm thick and it fits the OpenBeam very closely. It has bolt holes for 16 3mm screws which will vary in length depending on if you use washers or washers and lock washers. This piece when printed at 100% infill is extremely strong and could even be used to co