I bought an Aristo Pacific a year ago and now I want to add a QSI sound decoder and Gwire so I can run with battery and remote control using my Airwire throttle. I also bought a Vanderbuilt tender to go with it as I like the Vandys better that the standard tender. I have already wired up the Vandy tender with the decoder in the tender using QSI ‘s Magnum adapter plug. I opened up the pacific and there is a circuit board with a DCC plug in the loco. (I know, I should have looked before I got started but it is an older Pacific with the plastic side rods so I didn’t expect a circuit board with DCC plug.) If the board wasn’t there I was going to wire everything up directly. I planned to use a 6 wire plug that caries the motor leads and the front headlight leads to the loco and the loco power back to the tender. (The smoke generator is going to be removed as it doesn’t make much smoke anyway.) I still think I should wire everything up directly but there are diodes, capacitors transistors and resistors on the board along with what looks like a voltage regulator that is mounted to the metal weight in the boiler. (I think this reduces toe voltage to 6 volts to run the headlight and marker lights?) What does all this stuff do. I assume that everything I need electronically is built into the decoder. I printed out the electrical diagram for the Pacific from the Aristo site and looked at the stuff on the QSI site and George Schreyer’s web site. Is it safe to wire the motor directly to the decoder motor outputs without the additional electronics installed on the board? It’s not so much that I don’t know what to do as I don’t want to burn up a perfectly good motor or lamps.