So no pressure right?

The main obstacle to writing my own TZ-85A code is that no one has reverse engineered a schematic and I don't know which pins are used for what. The ATMega8 has 24 usable GPIO pins and I would have thought that only 11 would be needed for the brushless controller (3 high fet channels, 3 low fet channels, 3 sensors, 1 temp sensor and 1 RC channel) but as far as I can tell they're nearly all used! I was getting copies of the RC signal in on 3 pins which included the serial input/output pins (which has given me a separate idea).

I eventually settled on PORTC Pin 2 as it seemed like it could be the sensor pin for the unused phase, so here's a teaser shot for the TZ-85A servo: