About this 3D model

So, i wanted dual extruders on my MendelMax. I also didn't want to change the stock x-carriage to anything larger. So these parts are designed around jonaskuehlings reinforced x-carriage. http://www.thingiverse.com/thing:18657 It fits the standard extruder mounting holes. This will accept two groove mount extruders as long as they aren't too wide. J-heads work nicely. For the bowden tube holder i used m4 rivet nuts. I think that is it. let me know if there are any questions.