ORIGINAL: wackywheelz
Yeah just reverse the spring I think and can go on either side. I think the instructions lead you to build 6 identical bogies, but turning the spring around on 3 gives you left side and right side
All of the outside spring faces the same way on all units, the left side points to the rear and the right side springs to the front.
Then you end up with the left side oil reserves pointing towards the rear and the right side oil reserves pointing towards the front.