Sorting through my wood-pile I found an apple billet about 60" long, 3.5" diameter (at centre) that I had halved and sealed (4" along each end with a thick coating of PVA) and ignored for the last 4 years. Anyway, fully along the length of the pith a deep split has opened up, I can poke a screwdriver a half inch into the split, so it likely extends a lot deeper. My thought is to cleave the billet aling the split and try to get two narrow billets from it - if the split went perfectly I would get two 1 3/4" wide billets.