I've been playing with mine all afternoon. It's one of the re-released
versions (6-2323) but still has the same old problems.
1) when on the table I noticed the base was warped. Low in the middle and
high on the ends. So I had to screw it down to a 1X6. I also cut a hole
for the wires and the motor.
2) My baggage carts might be worn, its hard to tell but I raised the rubbers
away from the carts ever so slightly with a screwdriver.
3) I noticed that it ran better with the roof off. Loosened the roof screws about
half a turn and it helped.
4) put the board on small piece of carpet. Also tried styrophome packing
blocks and that seemed to work also.
A friend of mine who used to do a lot of repairs mentioned putting ear plugs
under the platform where the screws went. This kept all the motion on the
platform and also kept the train table from vibrating.
5) Best operation is at 14V
I'm also going to order new baggage carts to see if that is part of the problem.
Hope some of what I found helps you...
Bruce..