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edsmith0075 posted a topic in LEGO Train TechThis may have been posted already but I have come across other people searching for a remedy to adding an extra PF boogie to there existing setup. Having one PF motor will work for short length lightweight trains but most people like to run lots of rolling stock and the designs are becoming heavier with the more details being added to the design. So we need more power! You can simply add another PF Boogie, Right?! Yes and No. The additional boogie in most cases will face the opposite direction of the already installed one. This means the boogies pull in opposite directions! the simple solution to this is a switch to change polarity of the current on the new boogie. I picked up the part at Toys-R-Us. It was the Power Functions starter kit, came with a switch lights and small motor. I did this project on my latest locomotive and was pleased with the results. Fortunatly there was plenty of space in the frame to hide the switch and having the additional powered boogie allows me to hook up additional cars with little to no signs of strain or wheel slippage. Below are pics and you can refer to my Flickr page for additional pics. Feel free to add feedback or ideas to this tip. Previously I was splicing wires and soldering connections to fix this problem. This is much easier and cosmetically appealing.