Good to know Dan! I did a little looking today, and well 14s stick packs are sold out everywhere, and in Pulse Ultra they only go up to 45c, which for me I'm sure would be fine. However, if you go the 2 individual packs, you can get more weight, like you were saying you needed to get CG correct. My E5s and E7SE both use receiver packs, so that might be beneficial in this situation as well.
Just curious if you know how many mA you put back into your packs after 5 minutes at 1750? I quit flying on a timer last year, but somewhat still use one to see how much time I've flown for before my mAh counter goes off.
Other question, how much clearance you got with the Pyro 850? I know it's got to be tight!!