I have had problems with the ez track,  the small  1" and 3" fill in tracks. rails come off very easy and very difficult to snap back in place. Any suggestions?

Can you replace the trucks & couplers on older rolling stock with the new magnetic style that are on the newer cars?

On  N gauge will all bachmann brand cars couple. Are there different from older cars to newer. Will they all work with a magnetic uncoupler.

Thanks

What is the best way to bring wires thru your layout? The connections on the switches are wide and flat.

What gauge nails are used to mount the ez track sections