Sigh - yes, the house I grew up in at Simonstown also had such a floor. In Afrikaans we called it a "blokkiesvloer" (block-floor). My mom polished it regularly with an electric Columbus two-brush wax polisher. I'm sure any self-respecting mranggi would have stoked his hearth fire with it.
The wood is quite unyielding, and to get it as far as is shown in the two newest pics, took some doing. The pics also show the wide end of the gandar with four bambu pins inserted and epoxied in place. There's going to come a time after the gandar is affixed to the gambar, when the final finishing of both together must take place, but then I'll not be able to use much force, for fear of straining or even breaking the joint. (The wrongko's joint, not my own....!!!)