UPDATE!

Hi everybody! I've been having a rough term at school, so I haven't posted much lately, but here's a post with pictures to satisfy your curiosity as to what i've been up to!

First off: Hardware Upgrades (well, electronics, but close enough)

Added an e-stop button, wired in with the e-stop circuit

kludgy wiring for the e-stop switch :-) when the switch is pressed,
the 5v power is tied to the signal input line via a 100k resistor.

Also added a key switch that connects and disconnects the PS-ENABLE
line on the power supply. no real point to it, but it's awesome!