Mendel 3D printer Z extender, get an extra 40% build height

So, whilst working on another project (more to follow in a month or so) I nearly destroyed my Mendel printer by trying to print a part which was too high. Of course, this was the one time I wasn't in the garage keeping an eye on things and I came back to a twisted printer, over stressed belts and a huge mass of spagetti plastic. My first thought was a four letter word, my second was OK, how am I going to build the part I need? I then re-architected the part so I can split it in to 2, but this th