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How Flat Is Flat Enough?


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Hi all,

I've rough shaped the neck on my neck-through project, but figure I still have a good 1/8" to take off in thickness, and I'm almost set to glue the fingerboard on.

But the neck is a few hundreds of an inch off strait, with a slight dip back from say the 5th fret to the 15th. It's much less than the thickness of a piece of news paper, but I don't have my gauges. So I'm wondering if I should glue on the fingerboard, finish shaping, and then flatten/ straighten it to perfect later. Or if I should sand a couple of hundreds off from the 5th fret to the nut area, and expect the string tension to move it that much? ? ?

Any thoughts?

Thanks,

Todd

Edited by ToddW
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If it's actually less than the thickness of a sheet of newspaper, I have no idea how you could have eyeballed that. B)

:D Easy. :D I have my .001" straight edge and a lamp, so I can see the light, but if I put a piece of newspaper where the gap is thickes, right in the middle, you can't move the newspaper because it's thicker than the gap. Enough thicker that you can see the difference in the width of the light shining through.

:D

Edited by ToddW
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if you cant feel it, its not there

I actually spent another 30 to 40 minutes with a small sanding block and some 100 grit. Now it's almost gone. I was mostly worried about having varying fret heights later to get them level, but with where it is now, I think I'm pretty safe. OK, very safe until I screw something up later. . .

Guess I just needed some reassurance.

Thanks,

Todd

Edited by ToddW
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With that exacting attitude, I can't see how you can go wrong....keep working on those lines and you'll do well as long as you don't stress over a newspaper sheet's thickness here or there :-D

At least I can't perceive your threads having the word "Bondo" creep in. That stuff needs to be divorced from the lands of luthiery.

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I was mostly worried about having varying fret heights later to get them level

You're talking hudreds of an inch... It's good to be as precise as possible, but don't go crazy either. Anyway, frets are sitting on the fingerboard right? Even if the neck is not NASA approved, you can still level the fingerboard surface to perfection before fretting.

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Great attitude tward accuracy! You keep your standards up :D One thing I have found is that the higher your standards the smoother and faster your work becomes. Final product of course benifit all the way around. Use your measuring tools as you have been, visually you can see very small gaps using light, touch is good also (but you need to rely on measuring tools in some applications). When you do get around to leveling before fretting, get it spot on, this will make fretting go much better, and if you do it well you may need liitle or no leveling (this is where accuracy pays off big time).

Peace,Rich

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