I believe that President ploughs can be either 8″ or 10″. Can experienced users please advise which size suits the tractor better? The larger plough appears to use Ferguson T20 plough parts and that is aimed at a more powerful tractor. The smaller plough may not move enough soil. I realise soil conditions are critical but if both were available, which would you advise as the better plough. Advice welcomed. Thank you in advance.