I am new to T after decades away from model railroading, when I did N. To see if I could do the things I want to do in T, I ordered the Beachcomber set. It has arrived. I have started building some stuff and I have some questions. 1. Track. Running an engine on the stock layout, it's moving very stutteringly. I've found places where the rail wasn't properly fitted in the clips, but I've corrected all of that. I still see places where the engine seems to labor. Maybe there's a track fitting tip I'm missing. Is it generally better to use flex track rather than the snap-together stock stuff because of fewer joints? 2. Couplers. The stock couplers are terribly tight. I've been thinking about designing a hook/circle type connector that provides a looser coupler connection. The tight couplers might be causing the issue I'm having with question 3 below. 3. I've designed and printed several pieces of rolling stock and attached those to the adjustable chassis. I've used the weights. But the things still tip over extremely easily. I haven't been able to pull them one loop around the track yet because of this. Any suggestions here?