[jhautz]

I hooked my Watts-Up meter to my starter box and lipo setup just to see what kind of current spikes it pulled. I have a dual 775 motor box also, not that particular one, but it should be similar as far as power goes. When trying to start a brand new engine I was breaking in, it was pulling 40-45 amp spikes according to the low resolution meter I was using. I have an old 4s 4000mah 10C lipo pack (only rated for 40A continuous)in my starter box and it has been just fine. So I would say pick a pack capable of 50 amps continuous and you should be good to go with no worries.