I do plan to put 8 cell packs in it. I have 24 loose cells on the workbench waiting for me. However I knew that it was not a power problem that was causing me to crash.

Turned out I needed to tune the CG and get used to the way the plane flies. Now that I have gotten three successful flights, I can work on the finer points. I will build the 8 cell packs.

Thanks for the tips!