Are there better couplers that can replace the standard ones that came on our set (Bachmann n scale Yard Boss)?  Often the couplers do not engage properly and the cars just disconnect.  Is there a way to adjust the couplers vs. replacing them?

Hi all.  My 12 y.o. son asked for a set for Christmas.  We got him an EZ track set and we've gone full tilt (yeah!) with it.  We've used SCARM to design our layout which is pretty simple with a meandering design with two small bridges.  I've ordered and received all of the extra track we needed.  Today I placed all of the track according to the layout.  Our issue is that the locomotive will run for a portion of the track and then stop.  From what I can determine is that some of the track sections are not making contact because in a couple of instances I could lift/twist/press tighter some sections and the engine would begin moving again.  At the moment the track is sitting on a layer of extruded polystyrene which is on the benchwork.  We've not begun to add any grade or scenery.  We just wanted to see how it looked.

Please help and tell me what I've done/am doing wrong.  The set we got him is the "Yard Boss".  The total linear footage is approximately 26'.

Any and all suggestions are greatly appreciated.

Wes