Taida_Century_nRF52_minidev - pin mapping

First up - the README reference no longer has a valid link. Im planning on hosting the schematics i was provided, so i can provide somewhere to point to if needed. For reference, it seems to also be called 'Gold Core' at this point in time on aliexpress.

Regarding the variant.h pin mapping by @carlosperate and @d00616, was the pin mapping for tx, rx, i2c and spi arbitrarily chosen?

I ask because the 12 pin header exposes tx and rx, which are connected to either;

• GPIO3(Tx), GPIO2(Rx) if J11, J12 in RGZ are soldered
• GPIO2(Tx), GPIO1(Rx) if J15, J16 in RSM are soldered

I currently have RGZ soldered, but either option creates a conflict with the SDA, SCL pin mapping.

Is there a relationship between the pin allocation of TDI/TDO and MOSI/MISO on the nRF52? If so then one of RGZ or RSM may be preferable as the remaining two jumpers on the reverse side map TDI/TDO.