Re: Fretboard Radius
FYI, 6105 is "medium jumbo" and not "jumbo," which is 6100. I built a Warmoth a while back, and after planning it out carefully, accidentally checked the 6105-equivalent stainless box rather than the 6100 I'd wanted. Didn't realize my mistake until the neck showed up. As it happened, I got along with them well enough since they're essentially what Fender had used on my Strat, but I'd have preferred something a hair bigger.
I also didn't bother to level the frets when the neck showed up - action was fine right out of the box, so I think they, despite all Warmoth's disclaimers about bringing them to a tech for a level, were pretty good right out of the box.