Great pics thanks!! What a massive motor, my god. I can confirm that y- an d- wind motors behave kind of different. And what I have read and what I have experienced is that they react differently regarding timing. My TP motor d-wind works best with 7,5 degree. I think aveox, Castle motors have only y-wind for a long time now (dunno if that's true).
With what timing are you running the TP's?