we are planning on getting in the field tomarrow with the 9650sts and 8r 40" head. the head was an old 645 that we added on to both ends to make it an 8-40. the head was worn quite a bit so just about everything has been replaced as far as chains, rollers, and cogs. we added gvl poly snouts to it as well. they seem to be high quality and fit really well. i put an auger ext. on the unloading auger. its the one from shoup that looks like the oem 60 series. its very high quality, but a total pia to install. we run a 936d on this one and the buggy driver gets to close for comfort at times.