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About hjxbf

  1. I have 8479, and specifically bought an extra motor to fill both slots when the set was new. Only the motor driving the arm can be hooked up to the Code Pilot; the drive motor needs a separate battery box. I originally used a long cable connected to the old 9V battery box (https://www.bricklink.com/v2/catalog/catalogitem.page?S=5115-1&name=9V%20Battery%20Box&category=%5BService%20Packs%5D%5BTechnic%5D#T=S&O={"iconly":0}), but I am confident that it's possible to fit and use an IR receiver and a small battery box from PF. Having both motors in place and the Code Pilot turned on when driving, makes the rev sounds match the driving - it's a great experience!
  2. I did a quick mod that allows for 3 parallel clutches a few months back. To my recollection it was a matter of using longer axles for the clutches and follower gears, and omitting a structural bracing (3L liftarm) which the motor axle runs through. Works like a charm, with few unwanted stalls. See pic below and compare to BI Step 508.