need some advice for a futue bl project..

[t-maxxracer32]

i have 2 3s a123 so i would like to use that. ill also be using the batteries for my rusty so it would be nice to keep it at 6s. i will probably be buying another 3s1p starter sets at a123racing so i will have 4 batts and 2 chargers. making it pretty much 15-30 min wait between turns.

i think i might go for the quark because i dont like having hot things and plus ill be using the mm for my rusty.

what does the 1950/10 mean? 1950 esc with 10l motor or something? what will my speeds be with the 1950/10 with 6s123? also what am i looking to be spending on this setup?

thanks!