R40, if in good shape, will be a very nice machine for you. We do a little under 200 acres. 150 bushels is a FUll bin, usually a little less than that. Fabricate some sideboards, turn up the pump and change the 4 to a 5 and you got yourself a 50. Plays w_ 15 ft flex and 436 Hugger. Seems more suited for a 20 ft and 6 row. That's what the previous owner had on it. Would be nice to have those sizes, but I've got a few narrow clearances and don't want to mess with a head hauler. Have a good one.