The coppice trees actually tend to have a limited size too To get planks good enough to make a guitar out of the tree needs to at least twice the diameter of t

The coppice trees actually tend to have a limited size too To get planks good enough to make a guitar out of the tree needs to at least twice the diameter of the plank, a plank sawn right through the middle of a tree will warp horribly and probably split down the centre. To get wide planks you need an old tree. See 'quarter sawing' on your favourite online resource.