If you wouldn´t mind, we could establish support for two or more variants of TPD: the old 8x8, which I am still using on my handwired SEQ and the new 16x8s, which all PCB owners (proud to have one, too ;-)) will be using. An additional entry in the hwconfig file might be: TPD_TYPE, which can be 1, 2, ... as there are many other configurations thinkable - e.g. different LED pattern orientations on the new PCB.
In seq_tpd.c function SEQ_TPD_LED_Update(void), a conditional testing the configured TPD_TYPE then would execute the specific display code for each type. Don´t worry, it would not have large executable size impact on the sequencer binary, the current binary code for the 8x8 TPD is probably around 60 bytes :).
Many greets,
Peter