new fan grill
thickened fan duct walls
proper indentation
added built-in tensionner to the idler
readded belt guide for 608zz bearings
added mechanical endstop holders for all axis (makerbot style as sold by reprapdiscount)
new switch holder that goes on the side of the power supply
modified y motor holder so longer screws will work
shortened overall height of x-ends
x-ends don't use pushfit entry for rods anymore; they now use simple round holes in which the rods fit tightly
x-carriage now use just one bearing at the top
x-end-motor can support a screw that hits the z endstop for very precise adjustment of the z-offset
remove unused fan mount
minor adjustments to the extruder
updated platter with all new parts on it