Using the “Angle” command I can easily find the break angles to the tuners. Set up a zero fret to make sure angles were accurate. Wraps around the tuner post can affect this angle. According to the gearpage info anything above 10 degrees with tremolo may cause more binding at the nut. I feel like the extra tension from the scale length and heavier gauged EAD strings will create enough tension. From my measurements, there is steep change from the G and D strings which coincide with the heavier string gauges on those strings. Definitely some trial and error involved. The high E string seems to be slightly above the threshold. Will try what I have now as my base. May need to tweak the design a bit when adding the tremolo. 3+3 headstock may comeback.

Break angle strings found in rhino with “Angle” command
E 175.291 = 4.709 degrees
A 174.446 = 5.554
D 174.268 = 5.732 degrees
G 172.930 = 7.07 degrees
B- 172.389 = 7.611 degrees
E – 169.168 = 10.832 degrees

From Terry McInturff from the gearpage

“Perhaps it is best to discuss this matter with a general review of some basic facts regarding this particular topic.

A. A steeper headstock angle will impart slightly increased string tension as compared to a shallower headstock angle. Increased string tension suggests a slightly different rise-time and overtone series. These are big topics for another time.

B. A shallower headstock angle is a prerequisite for any guitar that sports a non-locking vibrato bridge. This is because the steeper headstock pitch forces more string “down-pressure” at the point at which the angle changes…ie, the nut. Any headstock angle that is steeper than 10 degrees (and 10 degrees is pushing the limits!) will cause the strings to “saw to-and-fro” as the bar is used, and the strings will quickly start to bind in the nut slots; they will not return to pitch.

C. A steeper headstock angle usually makes for a weaker area on the neck at the point at which the angle changes…again, at the nut area. Many of these necks will be prone to breakage at this point. Proper neck design can minimise this;it’s worth mentioning that some of these workarounds can have notable effects upon the guitar’s tone if taken to extremes, ie, multiple laminations of the headstock ala Vega White Lady, Alembic, and etc.

The above are some facts that can provide a basis for conversation, I hope!”

https://www.thegearpage.net/board/index.php?threads/calling-out-to-builders-headstock-angles.432040/