KCee I have the BB B21(9*) now also. Had a hell of a time getting even close to a square face. Have it set at N, -1, and it sets only a little open. I never could get it square, or more open. May order of the special adapters that are now out, for more complex settings, but iirc, they are mainly for flat/upright lies. Haven't hit it yet, so it could be set perfectly as is(for me anyway).