I'm thinking about getting a custom 6-string made and the finer details have been stressing me out. One of which is fretboard radius. Now this is going to be my main chording axe and everything I've read about FB radius is the smaller radius is better for chording while larger and flatter is better for leads (most pages were in reference to guitar). However; with basses the more strings we have the flatter our necks have to be which puts me in quite a conundrum. Does anyone who plays a 6 know their radius and more importantly how low can a 6 radius go? For example would a 9" make the FB so round I couldn't get to the low B?