Nice write up. I suspect Eoin may have already suggested this but you may want to look at your TX to see if it can do exponential stuff with how much power your motors get in relation to where your controls are. I had to do this on Kaizen/Jibril to get the axe to fire at a good rate without much input from me. It might make EWC that little bit more controllable.

Yes, definitely consider adding more weight to it, perhaps over the front for balance?