At Ravenna the Spanish and their Papal allies deployed somewhere between 30 and 70 war carts. These had been devised by Pedro Navarro. They were armed with heavy arquebus and were fitted with defencive spear points and scythes. From the description I have (given in F. Taylor's The Art of War in Italy 1494 - 1529) I have made the following model.
The wheels are by Irregular Miniatures, but the rest is constructed from Miliput and various odd bits of tube an metal. I will make a mould from RTV rubber so I can cast a few in white metal. The piece will be cast (without wheels) in three pieces, possibly four if I finish and fit the wooden 'gun shield'. I'll buy the wheels from Irregular Miniatures.
The gun shield is almost finished, but I'm not sure if I'll add it as I rather like the model as it is here.