Nikos
Understand, I was just giving you a heads up on what is available, incidently the Fromeco switch is not fussy about what battery is connected, it will still work exactly the same with a LiPo or Nimh and give you a read out of how much current was consumed during flight and each subcequent flight until you zero it.
Quique Simozini had his Python go in because the Powerbox was unable to supply the current load from the Digital servo's, on investigation they determined that each servo was pulling over 4amps each under load (holding power) and as he had seven in the Python its not supprising he overloaded it, mind you his flying is just a little bit different than mine

I wished.
Good luck in your F3A
Mike