A view of the pore filling. After I file the frets (and I'll do it again after I finish polishing them), I use 400 grit paper and work a small amount of linseed oil on the fingerboard. This is not a normal thing, I'd guess, but I like the way the fingerboard feels better with the cake of dust and linseed oil dried in the pores.
Since I have a relatively roughshod way of installing frets and I'm making the fingerboard by hand, there can be small gaps under the frets here and there. They are unsightly, but as long as the fret is tight and level, i can't tell any sonic issues (my loudest solid body guitar is one I've made, and none of the other seem to suffer anything).
At any rate, the cake will fill the gap under the frets (we're not talking about gaps of half a freight height, just small gaps from irregularity of fit or fingerboard or whatever. This is one of the reasons I install frets with a drop of CA glue at each end and in the middle. By the time the frets will ever need to be replaced, I doubt the glue will have that much hold - but I'm also unlikely to have to replace any frets as I have too many guitars and building them soaks into the time playing them.
I did half of these as hammer installation and half with a press. On a fender neck where the fret tangs go to the edge of the fingerboard (unless a small bit is nipped to fill the fret ends on the side of the fingerboard with a color match to the fingerboard), I haven't found a difference between malleted frets, and pressed. On this guitar, I tapped half in and drove them home with a caul/clamp (a press) and those did go in more evenly. I won't go into the factors, but I guess that will become the default method forward along with perhaps making a radius double iron plane fixture to make the fingerboard radius a little more accurately. Whatever the case may be, I'm not buying anything to do it - that's not the point of these exercises - it's to be a builder, and not a buyer of fixes.
If you look at this picture, the left two frets haven't been sanded/caked yet, the others have. If this is left alone, it stays in pretty well and the oil hardens or the cake dries out and stays put as the oil goes into the wood. This could be done other ways (CA glue would work fine), but this is quicker.
I will come back later with a much finer paper so that there are no visible marks. This is a good time to do it because I sometimes leave marks on the fingerboard that need to be sanded off (from the corner of the crowning file).
The crowning file itself is a good lesson in staying away from screw mac. it's basically a rounded parallelogram with diamonds that I got directly from china. I haven't bought screw mac's version (which costs five times as much), but I doubt it's made in the US and if it's hosco (japan), then it's already 30-40% higher at screw mac, anyway.
The $14 diamond crowning file has done a lot of work over the past 5 years, more than just level crown and polish (because of my less than perfect fret installation, the file gets to do about 30 minutes of solid filing on a guitar like this one).
These frets are jescar jumbo - something like .056" tall and .110" wide (there are various jumbo sizes and these are probably taller than vintage jumbos). I always feel like I need the extra height in case I get one in lower than others, but they still end up having a lot of height. These are still around full height and may be obnoxious to play due to the high height.
If they are, I'll make a guitar with lower frets later just to have options. I don't like tiny frets, though, either and admit that a medium fret looks funny on a les paul.
Since I have a relatively roughshod way of installing frets and I'm making the fingerboard by hand, there can be small gaps under the frets here and there. They are unsightly, but as long as the fret is tight and level, i can't tell any sonic issues (my loudest solid body guitar is one I've made, and none of the other seem to suffer anything).
At any rate, the cake will fill the gap under the frets (we're not talking about gaps of half a freight height, just small gaps from irregularity of fit or fingerboard or whatever. This is one of the reasons I install frets with a drop of CA glue at each end and in the middle. By the time the frets will ever need to be replaced, I doubt the glue will have that much hold - but I'm also unlikely to have to replace any frets as I have too many guitars and building them soaks into the time playing them.
I did half of these as hammer installation and half with a press. On a fender neck where the fret tangs go to the edge of the fingerboard (unless a small bit is nipped to fill the fret ends on the side of the fingerboard with a color match to the fingerboard), I haven't found a difference between malleted frets, and pressed. On this guitar, I tapped half in and drove them home with a caul/clamp (a press) and those did go in more evenly. I won't go into the factors, but I guess that will become the default method forward along with perhaps making a radius double iron plane fixture to make the fingerboard radius a little more accurately. Whatever the case may be, I'm not buying anything to do it - that's not the point of these exercises - it's to be a builder, and not a buyer of fixes.
If you look at this picture, the left two frets haven't been sanded/caked yet, the others have. If this is left alone, it stays in pretty well and the oil hardens or the cake dries out and stays put as the oil goes into the wood. This could be done other ways (CA glue would work fine), but this is quicker.
I will come back later with a much finer paper so that there are no visible marks. This is a good time to do it because I sometimes leave marks on the fingerboard that need to be sanded off (from the corner of the crowning file).
The crowning file itself is a good lesson in staying away from screw mac. it's basically a rounded parallelogram with diamonds that I got directly from china. I haven't bought screw mac's version (which costs five times as much), but I doubt it's made in the US and if it's hosco (japan), then it's already 30-40% higher at screw mac, anyway.
The $14 diamond crowning file has done a lot of work over the past 5 years, more than just level crown and polish (because of my less than perfect fret installation, the file gets to do about 30 minutes of solid filing on a guitar like this one).
These frets are jescar jumbo - something like .056" tall and .110" wide (there are various jumbo sizes and these are probably taller than vintage jumbos). I always feel like I need the extra height in case I get one in lower than others, but they still end up having a lot of height. These are still around full height and may be obnoxious to play due to the high height.
If they are, I'll make a guitar with lower frets later just to have options. I don't like tiny frets, though, either and admit that a medium fret looks funny on a les paul.