blank

The active timer users seem to have migrated to 6s setups for more voltage headroom.  Just an observation to keep in mind.

I think that in general you save MA if you stick to a 5-6 range pitch prop.
Seems like in general, the low pitch arrangements use more battery, keeping the RPM's up.
If it were me (and it could be coming up soon), I would try to find a very similar sized plane that is successful, and pick the same motor/prop/ESC/battery arrangement if possible.
If not completely possible, I would stick to the closest KV and weight motor that matches the suspect plane and your plane. The rest should be fine tuning through the timer and prop; I would think that would get you close enough.

On buying batteries, you could by some less expensive brand "one-off's" of 5S and 6S and experiment with them, then wait for ThunderPower's holiday sales (and we are coming up into the holiday seasons being close together, yay!), The cheapo's should get you close and you can sell them after with 4 or 5 flights to an RC guy.

It's funny that you are "Motorman" and asking about E-power. No disrespect intended. Just thought you were more of a glow power guy.

Best of luck with your project.

R,
Target
PS. I sure don't mind not wiping off my E-powered plane after flying it. But the charging and storing and transporting of LiPo's makes me a bit uneasy. That is a lot of energy ready to go at the drop of a hat. Glow power seems safer in many regards. One cannot overstate the advantage of always having consistent power runs that you do with electric, though.