[MBCpro]

MJ,
I didn't say it was a requirement, if you read further from Mr. Kelley in 10-19-0, he says "All are interchangeable - with reservations. Hitters using Horizontal hinging must consciously resist the tendency of right arm paddlewheel action towards angled hinging". He goes on to say,"Both procedures require skill in clubface manipulation." The both refering to swingers using angled hinge action.
While we are at it lets look at 10-10-C Angled Hinge Action, Mr. Kelley writes "It greatly simplifies Hitting."
Like I said before if it works for you have at it!!
Just one more question for you what left wrist action do you use?

todd