Well, the side blocks are, in fact, solid teak. I know this because the whole assembly was flat-packed and is self-assembly. Three huge boxes! In fact, the factory had difficulty in drilling the countersink holes at the bottom to facilitate assembly, and they had to send a replacement part to enable the whole lot to fit together. The wood was so hard and dense the drill could not drill the hole properly.
Anyway, it got sorted. The grain doesn't follow, because of the order I put the unit together. In hindsight, I suppose I ought to have taken more care, but didn't think of it at the time.