Models printed at Shapeways in FUD material, it is expencive but provides smoother surface. Another materials are much cheaper but surface is a little grainy.
Pz.Sfl.II is 2-piece model, hull and turret. Feuerleitpanzer is one-piece, no assembly required. Barrel is slightly curved but it is could be repaired easily by heat. Just jently heat and bend it.
Pz.Sfl.II: http://shpws.me/N9aY
V-2 Feuerleitpanzer: http://shpws.me/OqMz
