Looking for people's opinions on a 12 row versus an 8 row 30" corn head for a 9750. I have heard alot of people say a 12 row is too much for a 9650. How will the 9750 handle a 12 row? The 9750 we have is 2 wheel drive. Will we need to add weight to the rear axel if we go with the 12 row?