It requires alot of tension to tighten 6 "C" section V belts.I have never liked to put that force on the arbor.I took a pillow block bearing mounted it on the arbor outboard of the pulley with a threaded rod at its base,that in a pipe extending close to the engine pulley.Adjusting nut on the threaded rod allows easy adjustment of the belts and relieves alot on tension on the arbor.A outboard fixed bearing could also be used but without the adjustment advantage.Will also be making a safety bar on the sawyers end of the husk,between the sawyer and the blade its also handy to mount the remote throttle, clip board, and flack screen.I also like to mount a remote clutch release just in case.You old sawyers have and handy tips or advice ?? Thanks Frank C.