I've created a rather simple layout that I've been working on & decided to add a junction to another line just to test my building skills...anyhow my consist keeps derailing when passing through the junction.I figure t hat it's because my track either isn't long enough between the junction point & the point at which it straightens out to accomodate the wheelbase of the cars or doesn't go out far enough before making the turn....are there any good junction making tutorials available?