Did anyone else get one for Christmas? The base on mine seems kind of flimsy and sags in the middle Is this typical? How should I go about supporting the base so it doesn't dip in the middle? I know it doesn't look it the pictures but, Laying a straight edge across the track shows the track to be flat I also got a new airbrush setup and tried it out by attempting to weather the rails. I'm hopping that ballasting the track will cover my over spray. The base was sanded and given the first of 3 planned light coat of paint. to prevent any chance the white base will show through once the ground cover is installed. Any tips tricks or advice would be greatly appreciated.