Looks nice Steve! I have the exact same project on my workbench. It's one of my set-aside projects though. One thing I noticed about your kit is that the grouser box vents seem to be too proud of the engine deck corners. Simple solution however. Just sand off about 1mm. have a look here:

You see that the vent lower rim sits above the plate but not too much. HTH
Great work. It really motivates me to get off my duff with this "shelf queen"!!!!