I am setting up a layout for my grandson. I bought him a set with a 24x48 in. layout. I want to have two or three tracks for him and run diffrent trains. looking in the catalog I'm not sure what size curved track I need to do this. Is the curved track that came with this set 12 1/2 in. any advice would be a great help.

I am looking to buy a dcc train set package. I have quiet a bit of the quick track with black base, will this work with the dcc set and nickel-silver  track, and how large of a layout will it support.