Thank's rm,

Currently with the EP setup, I get 6 flights on a single 850 Mah 2S-LIPO and on the YS I ran the Tech-Aero dual regulator system with dual TP 750 (I think that's what size they were) and I could get 9 flights. I will figure 3-4 flights on the LI-FE 6.6 packs. All the regulator/fail-safe switch combinations I've ever used, my favorite is the Tech-Aero, light weight with various options, especially the dual system.

I love the Flight Power LI-FE packs for the big stuff, but the down side is the weight of the 5200mah packs, but the weight trade off may be similar when considering adding a Power Expander/PowerBox setup?

Thank's for the feedback.

Bill