I inherited some 20mm rimu boards, thanks to earthquakes and consequent demolition, and have started turning them into things. It's not A-Grade wood, being a bit curly and twisty in the grain and prone to tear-out, but it's not the worst I've seen, and it's fine for shelving, which is what I've done with it here.
It would be a completely straightforward job, except that the batten-and-board panelling necessitates a bit of edge-profiling to get everything neat. The house is getting on a bit, being about a hundred years old, and if it was ever completely square, it's not now. So each board has to be profiled and checked out individually.
Anyway, it's done now, and we can start filling them up with CDs and some of the multitude of knick-knacks we've spent the last thirty years collecting.