How would you fix frets?

[George Tsoukalas]

I've never left staves strung for long periods.
I'm a cellar bowyer.
Pretty sure that did not cause the fret though.
I've had quite a few of those in my bowyer life.
I stopped having them when I decided to remove small amounts of wood and test the bend frequently.
It also helps to know when to put down that aggressive woo removing tool for a scraper-like tool. Once I string it up for the first time I go to a scraper-like tool.
Aywya, keep making bows, aj.
Jawge

[Del the cat]

learn from it.
Where did it break? In the middle.
Why? not enough thickness taper, too much bend in the middle, hinge, over drawn before tiller corrected etc.
Del

[sweeney3]

What's the line from one of the TBB... You learn a lot from every bow you make, but you learn more from every bow you break. 

[Springbuck]

  Are they SURE that Seminole bow was made of mahogany?  Everything I know about that wood (which is only a little) tells me that it is very brittle, stiff, but not at all elastic.  That's odd.

 And that is exactly what I would expect, from the wood.

 I have patched a back with linen before and had it last years, by glueing on individual raw linen strands like sinew backing, fading them out, and then wrapping the whole thing to hide it.  But it is ugly, not at all historically accurate, and sketchy.

Toss the board.  Good luck next time.