I just skimmed over it with all the back and forth post that were going on.
I thought you were asking which is better,might have something to do with the cold ones I am drinking.[:-]

The 3 finger is harder to CHEAT than the 4 finger.What is meant by that is a bt actually requires some rotation to fire and a 4 finger is easier to rotate with your fingers(bypassing the back muscles)than a 3.Once learned,a 2 finger is probably the best way to go but not to learn with.