For Incidents Happen:

I was designing a guitar from scratch, and I needed to know how thick my fingerboard would have to be in order to acommodate a given radius. I came up with:

2h = 2r - [square root of (4r squared - W squared)]

Where:
h = height of the centre of the board above the edges
r = radius of the fingerboard
W = Width of the fingerboard


For everybody:

What's the best radius for your style of playing, and why?