The ports and pins for the TX/RX leds should be swapped.
Done.
what I meant was if you plugged your own LED (and resistor) into D10 on the board, Blink will flash it when led=10 or led=77.
Ok, what I've done should be enough then I think.
for example digitalWrite(79,HIGH) will set both pins 70 and 71 - I don't think it's helpful to add these to the diagram though.
Probably not, if there are useful anomalies I'll add them, at this point I think the diagram is bordering on information overload but there may still be a few things worth adding.
Note that the PNG size is way smaller, I exported to PNG8 rather than PNG24, with the limited colour gamut being used I think that's OK but let me know if it stuffs anything up.
Rob