Brian, yes, I'll be useing the 3+1 degree plates. You may only need 3 degrees with a 15" prop. This 16/4 is a different ball game. As far as others not wanting to put any effort into the mods that matter, what can I say. They are also the ones that will stand back and marvell over our results or just not admit to the benefits and go out of their way to convince others that it is not necessary, to justify their lax approach. Again, its all about how anal you want to get. For some it just dosn't matter. "What do you mean, balance the prop".
Lord, with those prices, you have got me beat. Better check with the accountant, you may be able to write it off. Joe