Built this for myself a few years back from a old sound follower ; I use two wet two dry rollers;standard mini paint rollers so cheap disposable;I personally use the Harris one which are £10 a pack of 10!and spin nicer;cut this down to a sensible size -runs at 24 or 25 frames with digital counter and x1 or x2 high speeds 16mm / 35mm Cine Film Projection Custom Built Cleaner And High Speed Rewinder.spacers for 16mm spools and quick flick over sprocket clamps;also can be used as high speed rewind