After gaining some inspiration here, I went through a process trying to improve my 60052 engine. It has 2 motors (including direction switch), headlights, IR Reciever, and battery box all housed within the engine (so it's pretty cramped for space in there!). I wasn't aiming to make it look like any exiting engine, just hopefully more interesting than the original! Let me know what you think!
IMG_1627 by caleb harris, on Flickr
IMG_1625 by caleb harris, on Flickr
IMG_1626 by caleb harris, on Flickr