Most makers have at some point made a guitar from the worst possible pieces of timber, only to be embarrassed by how good it sounded, and also, to have sometimes used the finest materials and spent weeks on exotic inlays, only to produce a complete lemon. That usually happens in the early days, when the maker thinks he knows everything in the world. The worst one though, is to spend all that time and money to make a guitar that sounds wonderful but quickly becomes unplayable. If you survive as a guitar maker, then those are the strongest way of learning lessons. If they haven’t happened, the lessons haven’t been learnt. Don’t buy a guitar from someone who has never made a mistake.