What I mean is there a standard distance the tracks should be apart. The reason for this is I hope to start work on a minifig scale model of various railway guns, first the Krupp K-5, then Dora and Gustav, then I hope to make the first train SHIP modeled after
. I can start work on the first in LDD at the moment but the others will not be started until a few more train related things are released(I have a feeling Emerald Night isn't the only thing going to be released this year) or atleast until I get the new power functions train motors and such. I know little about trains as the only train sets I ever had were the BNSF locomotive and the 03 cargo train.