OK......... after reading the article you referenced in your post, should have
read it all the way through the first time, I can only provide the following
information, take it or leave it.
I ONLY use 2.4GHZ on all my models, Spectrum Tx to be specific, and I have a mixture of Spectrum brand Rx's and the "Orange box" from HK,
and UMX BNFs from different manufactures. Also ESCs from EMAX,
PowerUp, Turnigy etc. etc. All my park fliers use 3 cell LIPOs and for
some odd reason use 2200mah and/or 1300mah size.
I have NEVER had any problems with low voltage or brown out or whatever.
I just MAKE SURE my low voltage cutoff setting on all the ESC's are around 3.8 volts or above for the systems where I can set the LVC,
AND I also set the timer on my Tx for at least a minute below where
the ESC starts to lower the voltage because the system is nearing LVC,
this timer setting was done by timing the flights for a while and then
setting the Tx. Also as mentioned in the previous post, I make sure my
ESCs have a BEC that is at least 3 amps, unless I am buying a kit where
all the electronics come with it.