OK, I think I understand now.
The only concern that I would have is that you can get a soft bale,
you might like to have enough angle at full curlback that the tip of the spear is a foot higher then the base at grade level,
that way it would not have a tendency to slide off while carrying it low down a grade.
Also the smaller base spears will keep a bale from from rotating,
which can be a good or bad thing depending on what you are doing.
spreading a bale out for bedding it can be handy to get them started unrolling by rotating by hand.
Good Luck
Lou