This installation of the Cartridge Rotary on a Seth Ciferri Walker frame features polished brass hardware and the 3.5mm stroke we’re putting on the first run of machines. It has just a slight amount of dampening or give, so the hit is quite firm. We put copper layered brass binders on it which match the frame finish great and will age nicely. Motor and drive train guaranteed for one year, and the parts are very easy to get. This Cartridge rotary oneoff is Sold.