I've done some rebuilding on my Lego Challenger locomotive. From now on, I'll put ALL the text up here, seeing how I can't use the modern uploader and the simple uploader isn't so simple... -_-
1: The smoke box has been extended from 4 to 6 studs in length.
2: The trailing wheels are now a motor (planning to replace it with a kitbashed 9volt motor) instead of dummy axles.
3: The locomotive has a brand new tender. I mixed the 3-axle trucks from the original Union Pacific Challengers (Big Boy's predecessor) with the tank structure of the Union Pacific Heavy Challengers (Big Boy's little brother). New 'stickers' will be added ASAP.