I have a Sigma SBF2-6 -- the Tele copy. I would put it in 7.5/10 shape, with the important things just fine: neck's straight, no cracks, etc. It does not have the original pickguard, however. Does anyone know whether a Tele guard will fit this (a guard with the humbucker hole in the neck, of course). Another question: By the time I'm done with this, it'll have a new pickguard and a new pot or two, plus non-original volume and tone knobs (although they match the originals). How much will this affect the value? Or are these interchangeable without hurting value?