Haenau - Z and Hot Bed

Just trying to keep up with the documentation, and some instructions.

see:
http://www.thingiverse.com/thing:1091057
http://www.thingiverse.com/thing:1091774

This is primarily for the Z motor-mount,
and the heated build plate.

To keep the cost down, and make construction simple, I used a pair of shelf brackets,
bolted to a sheet of acrylic,

which, in turn is bolted to 3 or 4 linear bearings, and the lead screw/nut.

resting on the front two holes (from the shelf brackets)
I hav