Thanks Bernie. The grousers were not my idea; I pinched Hans' technique! Thanks, Hans. I thought it was a good way of disguising or obscuring the curved track plates that you get with rubber tracks.
I'm hoping that when Master Box release their announced Mark II that the tracks and sides will be one-piece mouldings, like those on Emhar's Whippet. That way we wouldn't have to deal with bendy rubber tracks and a bunch of grousers to attach.
If I was patient enough I'd wait to see what the Master Box Mk.II grousers look like but I'll probably just make a master and cast my own so I can get my Mk.IVs finished.
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Has anyone else noticed "new and improved" seems to mean it doesn't work as well as it used to?