A Rear Headlight for the Planet 2

 Because the Planet 2 (with Mini Train Systems electronics*) is operated by a tethered controller, it is quite practical to run the loco in reverse with the driving car coupled to the front of the loco, but there is no rear light.  

(* As I understand it, locos sold in the UK by Maxitrak have the controls inside the cab, so the driver need to be positioned to the rear of the loco and drive by reaching into the cab.)

To attach the rear light, I bent a strip of 20 x 1.6 mm aluminium to match the curve of the cab roof, and drilled 2 holes (4 mm dia.) so that it could be fixed in position using the rear fixing bolts for the cab roof.  This avoided the need to drill additional holes on the cab roof.  I then formed some brackets to suit the light mount, which is via an M5 bolt and nut (supplied).

I found the light on eBay, and it is a Chinese made headlight intended for electric bicycles.  The cost from an Australian suppliers was about $20.  The light operates over a wide range of voltage 6-60 V DC.  With some assistance from Mini Train Systems, I should be able to wire it in to the loco control unit so it can be controlled from the tethered controller.  For initial testing, I wired the cable supplied with the light to a 30/50A Anderson connector and plugged it into the battery charging terminals.