MK7 Hack to Enable Filament Changes Mid-Print

This is not my own design. ALL Credit goes to Hoeken & nycdesigner for the Mk7 stepstruder and this hack. All I did was take Hoeken's solidworks file and modify it to take a 5.15mm hole where you would dremel it out, so in other words.. No dremel needed! It fits together beautifully but I have not put my Mk7 together yet to test it
this is a derivative, well kinda. This is http://www.thingiverse.com/thing:12075, it is not my own design.