Armoured artillery tractor

This is basically the lovely Holt 5t tractor from m_bergman with a basic armoured cab added. This is another unit listed in the AQMF rules but no miniature existed. I figured driving an open tractor to rescue field guns being attacked by Martians was a bad idea, so voila! There's room to mount a heavy MG on the roof too. Might make a decent improvised armoured vehicle for militia too. Scaled at the same 18mm as the existing vehicles.