The stock timing is 15 degs! That seems large to me. I'm not sure if its the same thing on a castle or if its a different measure but it seems to me that that 15 degs on the setup I've got on my 700 would burn somthing up..!
I believe I ran 11.25 degs my bl500mx which is also a 10 pole 6s motor.
Thank you for you input Chris, did you ever try the gov mode on your hw 100a?
Your e5-s vids are grate.