I'm loving my new TFL Zonda but only been running on 4S since that's what came with it. The guy I bought it from said not to run above 5S but I'd like the expert opinions. ESC's are seaking 120's (says they handle 6s) and the motors are SSS 2075's. Will this set up handle 6s reliably or should I stick to 5s? Don't really want to change esc's or motors at this point.

Thanks for your helping the newb.