Well when I was doing full tillage I'd bury the 3 point Oliver 458 as deep as I could pull it.

This 13 shank pull type pulled a lot easier in wheat stubble even though it was dry and hard. Not looking to go as deep as possible just trying to get some good incorporation of straw residue which tends to give me trouble in the spring as it stays wet and smeary and never seems to dry out.

I don't think I will have any issues pulling 15 but will go ahead and make the stub bars so I can go to 17 if I am able to.