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Lotsa questions over the years on neck angle, etc., just though I'd post something on it.
This build's a Hybrid and was built with a 28" domed top, flat UTB and started with a flat top rim, so I couldn't do my normal method (straight edge on the upper bout and a drill bit), but worked out something similar.
After some sanding on a flat board with the tail propped up, wanted to verify my calculations, so before gluing the top on checked the FB projection using a 7mm spacer (FB + fret height) over the neck block, held that and the soundboard in place with go-bars and placed a straight-edge on the spacer.
Then measured the height of the straight edge over the saddle position.
Picture below.

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The name catgut is confusing. There are two explanations for the mix up.

Catgut is an abbreviation of the word cattle gut. Gut strings are made from sheep or goat intestines, in the past even from horse, mule or donkey intestines.

Otherwise it could be from the word kitgut or kitstring. Kit meant fiddle, not kitten.

Excellent Colin. It is always best to check the angle early on and often during the build. I know this because I've discovered the hard way what can happen if you don't do it!!!

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Joe Beaver
Maker of Sawdust

Very good idea... out of interest, what hight at the saddle are you shooting for?

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www.leddingtonguitars.com

This is a nylon string hybrid, so 13mm, as I lose ~1mm to relief and then there's soundboard pull-up. Ending up about 11.5mm.
For a SS, then depends what I (or the client) want from the sound, but highest is 14mm, lowest could be ~11.5mm.

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The name catgut is confusing. There are two explanations for the mix up.

Catgut is an abbreviation of the word cattle gut. Gut strings are made from sheep or goat intestines, in the past even from horse, mule or donkey intestines.

Otherwise it could be from the word kitgut or kitstring. Kit meant fiddle, not kitten.

I do the same but only use the fret board thickness. I like the idea of using the fret board plus fret. Then again I assume 1 mm of relief under tension and I have 1 mm fret height, so that part washes it washes anyway.

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http://www.Harvestmoonguitars.com