Thanks for the props- :)
Re the trans thermostat, it really is there to maintain a more constant fluid temperature. Coming down I-70 from Idaho Springs yesterday the fluid temp did cool off to 165 F, but that was it. Before I installed the thermostat it cooled off much faster and to a lower temp coming down I-70. It's not really necessary if you only drive in the summer, but I plan on using it all year round so I wanted to keep the fluid temp where GM recommends- 170- 200F IIRC.
Also, I chose to use the 12v & switch to control the Glowshift Temp gauge lighting because I really didn't want to dig into the wiring too much & hunt for a lighting wire. As a side note, if I had known about the Scangauge 2 before hand I wouldn't have installed the external trans temp gauge.