This is a Trumpeter Panzerjagerwagen, early version, which did not have the raised stowage bin. In this case I added some wooden blocks wrapped in paper towel and ship rigging thread.
I have learned to NOT use the rail beds that come in the kit as it just raises the height. Imbed the actual rails into scuptamold or celluclay groundwork and press in gravel, and chopped up lichen.
Vince B June 11.