I got to buy a straight edge for looking at neck relief

Lots of good advice here.
When I'm making a neck and sanding in the fretboard radius, I use a flat straight edge (with the truss rod in its neutral position) to check straightness. From then on, I just use sight down the neck. I never use a notched straight edge...what's the point?! Once your guitar is fretted and stringed it doesn't matter about the fretboard...what matters is the top of the frets relative to the strings (unless it's an old guitar with very worn down frets that you're planning on replacing anyway). And if you're planning on replacing the frets, then you still don't need a notched straight edge. The whole idea is marketing hype to get you to buy stuff you don't need.

Regarding guitars already built and/or used - I always figured I’d want the neck to be perfectly set relief-wise then mess with the frets if they need it. If your neck is jacked up then you adjust the frets to match now both are messed up (although I guess it would play ok, yet both are not really where it’s ideal). My issue is I’m not comfortable messing with frets beyond polishing and rounding off the edges so if I did see a fret issue I’d take it somewhere anyway lol
 
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Regarding guitars already built and/or used - I always figured I’d want the neck to be perfectly set relief-wise then mess with the frets if they need it. If your neck is jacked up then you adjust the frets to match now both are messed up (although I guess it would play ok, yet both are not really where it’s ideal). My issue is I’m not comfortable messing with frets beyond polishing and rounding off the edges so if I did see a fret issue I’d take it somewhere anyway lol

Then, for sure, you wouldn't need a notched straight edge.
 
Yeah I know you can press the string down and look and stuff but I wanted a straight edge. My late friend always used one. It was not expensive either.
 
You said you wanted to use a straight edge to measure neck bow. A simple ruler will work. You don't play the strings against the fretboard, you play the strings against the frets. So that's the bow that's relevant to measure.
 
All you need to do is this.

images


Not this.

image
 
What Clint and I said...the neck is essentially irrelevant, it's the frets that count. The frets are what the strings come into contact with when you're playing.

If your frets are fine, as you say, but you use a notched ruler and find that your neck/fretboard is off and so you adjust the truss rod to correct the neck bow, now your frets will have too much or too little relief and you could have buzz or other problems.

Forget about the notched ruler. It's a problem MAKER not a problem solver.
 
If you wanna know what the neck relief IE what the neck is doing with wonky frets a notched straight edge works fine.
If you wanna know what the frets themselves are doing any straight or off-set notched straight edge works fine.
IDK why some here seem like "my way or the hiway" only apply.
 
Original posters are free to do what they want at any time. Telling him all he needs is a straight edge he already has in his house, and how that's the more legit way to do it anyway, makes it more convenient for him if he chooses to follow the advice.
 
IDK why some here seem like "my way or the hiway" only apply.

When people give really good advice to a noobie or someone who wants to know an answer, especially when those people giving their advice know what they are talking about, they are NOT being... "my way or the hiway"! I think you're being too critical and judgmental. If someone wants to drive his car off a cliff to see what it's like to fly like a bird, wouldn't you try to strongly advise him not to?!
 
When people give really good advice to a noobie or someone who wants to know an answer, especially when those people giving their advice know what they are talking about, they are NOT being... "my way or the hiway"! I think you're being too critical and judgmental. If someone wants to drive his car off a cliff to see what it's like to fly like a bird, wouldn't you try to strongly advise him not to?!

Any straight-edge notched or otherwise will work was my point.
If anyone was critical it was folks insisting their way works best.
I calls em as a see's em.
As for advice on the internet nobody really takes that serious at least i don.t.
Ask 1000 people the same question = get 1000 different answers.
In the last 15 years ive seen "dozens' of "noobs' blow up their amp by using "advice" on guitar forums and such.
 
I have a notched one with 24.75 on one side
and 25.5 on the other

If i want to measure the fretboard i use the notches
If i want to measue the frets
I slide it on top of them thare frets

Ni want to make sure the board is flat
befor i level the frets

Its really the first step in setting one up

I used do that with the strings
And if i cnat find my notched edge
i will
 
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