The problem I initially had has been solved. My current problem is the roller to pick up the power from the middle rail. This is the first one I've ever seen like this, it uses formed plastic strips to put pressure on the roller assembly to keep it on the rail. IMHO, this is a big fail. I know Lionel wants to cut costs, but this is ridiculous. The connector to the outside rail is also cheap, but it works fine.
Has anyone found a way to get this working more stably? The entire plastic unit containing the roller can be replaced, although I don't have a part number. I've got one of GRJ's LED lighting modules on order, hoping the capacitor will keep the light steady enough.