I have a great functioning MF 650 tiller, everything is complete it has had the width extension on it since day one it has the spline shaft at the pto box and squared shaft at the tiller. I have restored my 1967 MF 10 two years ago and have slowly attempted to restore the implements. Though the tiller works great, I do plan on restoring it over this winter, i.e. sandblasting, powercoating etc.. I was wondering though I have not tore the unit down yet if there is any way to replace the bearings on the tines, seals, etc.. And if so what size are they. Thanks.