I've got a mandolin I'd like to mend and I'd appreciate any advice.

I picked it up very cheap a few years ago, because someone had broken the back, and it had been given a very botched repair job. But I'd like to get it into proper shape because it's a nice instrument. Either do it myself if I can, or find someone who can do it for me if that's needed and affordable.

The plate on it says "The Michigan, B & SL Sole Agents". It got a slightly arched back, with twelve triangular pieces which converge on the centre, together. I've got all the pieces, some of them a bit damaged, and essentially they need to be removed, cleaned, and the back rebuilt so they fit snugly together, with the right kind of glue and so forth.

So if anyone knows of a decent book or website which might be helpful, or if they have advice themselves, I'll be very grateful. (And anything about the actual Michigan mandolin would of course be interesting as well.)