X-axis and cold extruder build

I continued with building the X-axis and the extruder drive mechanism. The X-axis blocks have about 10 captured M3 nuts- insanely difficult to install and align. I got them all in but it looks like I stressed some of the plastic on one of them a little too much while tightening the axis rod. I'll add pictures tomorrow. The extruder drive went together cleanly- I was glad of the note to install one of the captured M4 nuts before installing the geared stepper. Looks like I will work on the X-Z axis interface tomorrow and start building the hot end. Hopefully I'll be soldering up the RAMPS over the weekend and get some first motion next week.