Gorgeous figure on that neck! I'm really puzzled as to how/why you cut your scarf joint like that.
Normally, a scarf joint is made something like this:
When built like this, the "wedge" on the headstock portion of the neck is sandwiched between the neck portion and the fretboard, which in my opinion, might make it stronger and more resistant to breakage.
I'm trying to figure out the cuts you made to get the result you got:
Presumably, you started with a much thicker board and you made a couple more cuts to the headstock blank, then after joining it, you cut it down to the right thickness using a bandsaw in order to get the volute.
The way you've made it, i'd be nervous about a good whack to the headstock face potentially causing the headstock to break off at the join.
Or not.
Depends on what kind of glue you use, i suppose... most of the things i've read say that properly glued joints are typically stronger than the wood they join anyway.
I'm just curious as to why you built it that way as opposed to the "tried and true" method.