Thanks for posting the Tanic pack photo & link, GregF. You sure showed out-of-the-box thinking. Can you please clarify the pack arrangement? I take it from the photo that you have two cells per layer in series, then series with the next layer. The two 4S then hooked in parallel?
Second the 7 to 8 minute duration based on my 6S4P-7800's, only you will have have 25% more top end power! Also, you will triple your flight enjoyment. Instead of a take off & a landing circuit sanwiching 3 circuits of flying with GP3000, you should now get about 9 flying circuits plus the take off & landing.
I'll be glad to do the same in my EJF18E. I still have the 30/3. Should shed a half lb AUW with that & the Schubie
Is your field too rough to do gears? Your earlier flight pixes seem so.