I am contemplating selling some of my BCS collection to make more room and to buy some other implements. I have a 737 with a Honda 13hp and new clutch bought from Earthtools with less than 3 hours running time, a 30 inch sickle bar mower, a 26" tiller, a 28" Zanon brush mower, and a snow blower that I'll throw in for free. The sickle bar is a splined connection. All the other implements are late model tapered 3-dog interfaces. A spline to 3-dog interface is included. For sickle bar mowing, I especially like how the 737's reverse lever is quickly managed which makes mowing in tight places much easier, say mowing around a pond or in a thicket where the forward and backward moves get made in short motions instead of flipping a longer reverse lever as seen in the later BCS models.