Drawbridge for wooden toy (Thomas) train set

This is a drawbridge to fit Thomas the train wooden toy set. This is still work in progress. The design is fine, but I'm finding that, as printed, the whole bridge is so light that it moves around very easily.

I separated out the ramp and bridge files from the bridge sides so one could print the sides in a different color (for better effect).

Also, the scad file provides a testing parameter to allows you to see the whole thing assembled, OR to display it for printing. The ruler is there j