I currently have a 3 pound differential. used to have 2 pounds with full poly and did not want to change too much (changing only one variable) so I went with 3 pounds.
I hear a lot about huge differentials (over 6 pounds) but are there any pros doing something like that? I have seen a list with pro setups and they all had maximum 2-3 pounds differential (rarely 4), often none.
so are those big differentials really make sense or is that just a nice sounding theory that does not really apply to practice.