almost set to make molds, the pdsr uses mammoths, here is one, a hong kong copy of the Marx original. Once I make a lead copy, I will put armor and a steel blockhouse on it for machine guns. It will be a good match up for the polyester freestate's big cuirassier tank (a british Vickers Independent) .  Anyway it, the Independant, not the Mammoth, needs to finish curing, I glued it with Gorrilla Glue, trying it out for the first time...seems good, but to use it one must clamp well.  But so far it works a treat on filament 3d prints. I cut away part of the underside to reduce metal also, since these are massive (mammoth?) vehicles.  Also think these wheels, from a scandanavian toy car will cast better than the model kits spoke wheels for the kitchen and armored car... will pop back into the shop in a few hours and set up for mold making.