Just bought a few sample pieces of MTH ScaleTrax, and one piece of Atlas flexible track on ebay. Looking at both brands to decide which one to use on my new layout. Feel a slight preferance for the MTH at the moment because it's dimensionally a bit more prototypical, and the flexible stuff seems more easily formable. Question: How do the MTH flexible pieces connect together electrically? Is there a rail joiner available? Any experience out there, as to other characateristics I should consider before making a brand choice.