Brawa have produced a model of the BR 19.10 which was an experimental loco using cylinders in a V-2 configuration acting directly on the ends of the axle. There were 4 sets of cylinders attached to alternate ends of the driving axles, thus each driving axle had it's own power and subsequently there were no connecting beams to be balance compensated. An interesting experiment that was again cut short by the advent of WWII.
Kramm have these models for an enticing price should you be interested.
History (German - apply google translate)
I do wish somebody would produce this in N