4mm bullets?

You'll save a ton of weight by going to a very small lipo rx pack and a regulator. Plus you'll gain no self discharge, always constant voltage, and your choice of voltage.

Another 14XL. I'm still waiting for someone in North America to try the 13XL. I would if I was going to run a C50. 57A on a 22x12 isn't what I consider ideal electric power.

Why did you change wing incidence instead of stab incidence? If I understand correctly, the difference would primarily be resultant thrust angle, as wing:elevator angle will end up in the same place. There also might be a change in fuselage flight angle. Maybe. I'm just hoping to bring out discussion in this weak area of my knowledge.