Buildings on fire

When a building is hit by HE - Roll a 1d6 to see if it catches fire - effects are that it takes several turns to burn out ( roll a 1d10 to see how many turns it burns for ) -- and the defenders have to leg it before the die roll expires, or be cooked/lost.

Collisons/over running guns only appiles to medium and heavy tanks

A gun/support weapon maybe be driven over -- (the crew will automatically get out of the way). Roll a 1 d6 - a 1-5 result and it succeds the gun is destroyed, a roll of 6 leaves the tank with a light damage ( broken track/wheel ), and the gun survives.