Coming to the party late, I have found that most of the best Forgeworld resin pieces are no longer available. After a couple of Ebay purchases and some left over parts I've started to put together a tank turret emplacement.

And what's a tank battle without tank traps/dragons teeth. It looks like the new Stronghold Assault covers rules for these. Here is my work in progress with scratch built dragons teeth conveniently measuring 6 inches across...