Does anyone know if the motor on a 404 has a grease tube to fill like the 301 does? Also, does anyone have any idea why the motor spins quietly and smoothly when I spin the gears with the handwheel off, but when I put the hand wheel on, it is stiff and noisy? It is greased up and clean, and the assembly is pretty straight forward. Can't imagine I put it together wrong. Please give me insight so I can go on with my life. I've been working on this for two days. :(