So, I am now working on my first scratch build, and reading lots of the build threads, but there is still one thing that I feel I haven't quite got the grasp of, so want to check something before I move on with making a neck. (And, God, have I spent many hours poring over threads on here, and many other place on the internet, but cannot find answers that really settle the matter in my mind) I am going to make a two piece neck, RW fretboard. So I see no need for a skunk stripe, and am concerned that I would struggle to make a skunk stripe that was good enough anyway. I have visions of it not being a perfectly snug fit, and that always annoying me.... I like the look of skunk stripes, I just think for my first neck, why add that extra level of VISIBLE workmanship, when it can be hidden and less perfect. So, that would necessitate me routing the channel from the front, and I want to use a single action truss rod. Here's a little diagram I made myself to make the principles clearer in my mind: So, in Fig 2, that shape is achieved by routing a curve, from the back, meaning the channel routed has made the curve by having the lowest points at either end, and the high point in the middle (convex, right?) Here's where my mind is still going wonky: Routing from the front, would one route a concave channel, with a corresponding insert to go over the truss rod once it's in the channel (so that insert would have a concave curve on the side facing down into the channel, and flat on top)? I'm assuming the channel needs to still be concave rather than being flat, as being flat with the curved insert would leave gaps in the channel when the rod is tightened? How thick does the fretboard need to be to withstand the force of the truss rod & curved insert?