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Hi. I have built some guitars but am trying something new.
I have started making a twisted neck 6 string. The high e at the nut is set back 16 degrees, (lower when the guitar is on its back) and the low e is straight, in line with the body as normal.
The theory being that it is more ergonomic because you don't twist your arm as much
I also decided to make the neck multiscale, or fanned fret.
I cannot decide on the best ratio of scales to use. I have seen 24.75" to 25" with the straight fret at 12.
I also have seen 25.5" to 28" straight fret at 9.
Any thoughts on choices?

Well as there were no suggestions, I made a decision to use 24.625" to 25.5", So only 0.87" difference 22.2 mm. I cut the fret slots, straight at fret 9 and and shaped it to 12" fretboard radius. However it will be bigger at fret 1 and 22.
I may have bitten off more than I can chew.

Good luck and please keep us posted. You are cutting the trail that others may follow.

_________________
Brian

You never know what you are capable of until you actually try.

https://www.howardguitarsdelaware.com/

The first pic of the strat style body, with the neck in rough shape. Shaping the back with a twist is a little challenging.
The body was originally for a pickup test guitar. I decided that I would incorporate both together. The electronics all will slide out. The plan being that a few modules can slide in and be replaced in seconds for true side by side pickup tests.