Ha! Beard envy.
No @3below I think you have those columns mixed up. The neck is 14.5mm dropping to 12.5mm, the depth of the channel fairly consistent at 9. 5 the 5mm is the width of the channel.
Otherwise the channel would be deeper than the wood in which it sits!
Hi guys, thank you all so much for your thoughts on this. I'm heading to the shed now and shall attempt to answer some questions when I get there. Andy's question about material removed from the nut end I can answer now. I scraped back a couple of mm from top and sides of the rod (before we embarked on this craziness!) as a first attempt to expose more thread and thereby have space for a washer. The (now snapped off) end of the rod had no useable thread at the tip so a washer essentially made it impossible to start the nut. Which is why I thought I might win by exposing a little more of the rod. I removed nothing from the underside.
No idea! Never as much as held one in my hand.
Let's hope it's just lacquer cracking.
@Andyjr1515I thought the channel wasn't deep enough in the centre for single action?
Well all this may be academic. As I was putting the bass in its case I felt a sharp edge catch my skin. Turned it over and the neck has started to split.
All good narratives need our hero facing certain defeat, but is there a redemptive ending to this story?
I'm staying in the shed. Right, taking volute to mean the bit that starts to curve towards the headstock, I measured as close to the nut as I could where the neck was still straight.
It's 13.5mm there but drops to 12.5mm thereafter. Until the 7th fret(ish) where it deepens to 14mm, rising to 15mm as we approach the heel. Oh and its 5mm wide
Not quite the perfect angle but you can see within a mm how shallow it is.
Saw this on the Sandberg vid I posted. It was an AHA! moment. That's what I'm after. Anyone think these can be bought? Or did the guy make it himself? I've tried searching but can't find one or haven't found the right search term.