Hi there,
I’m not sure if it will help or confuse you more. So if it confuse, please ignore this post before shooting me.
I’ve used drWiggly translator and everything was good except the fact that bones hasn’t their VertexRef defined. So maybe source of drWiggly’s translator could help? In fact I didn’t test too much, just wing with aileron, but it worked good. Aileron was rotating round point I asked it in bledner. When I used the other panda exporter it was rotating round the median point of wing.