Yesterday I finished fastening the first of several Circuitron Tortises to the underside of the blue foam scenery of my N scale C&O layout. I glued a piece of 1/8" aircraft plywood between the top and second layers of blue foam to have an attachment point for the switch motor. I applied 12V to the motor, and whoa nellie! I thought it moved wayy too fast to be a "slow motion" switch machine. So what I did was construct a small circuit based on the LM317T voltage regulator to allow me to set the power at whatever voltage I wanted. I set it at 6-7 volts, and the turnout motor works sooo much nicer now! Also, I included a bridge rectifier so the circuit can be powered with AC, DC, or reverse polarity DC. So what are you using to power your Tortises? Any other N scalers using them?