Jim, although there's no software or instructions supplied with the radio, there is plenty available on the the internet. What is needed is dependent on the PC configuration. Just had to sort thru it.
Regarding the TX weight, I was loosely comparing this TX to a Hitech Ranger II, both with 8 AA batteries. But it's no big deal.
Regarding the voltage indicator on the Tx, I saw this at http://www.mycoolheli.com/t6config.html
Info on the Power Meter LED
Voltage levels (tested by someone else) of the LED power indicator
LED steady green : SupplyVoltage > 10.8 Volt
LED steady orange: 9.4 Volt < SupplyVoltage < 10.4 Volt
LED steady red : SupplyVoltage < 9.1 Volt
It is ok to run NiMh batteries into the orange category but once it gets down to the red you should replace IMMEDIATLY!
If that's accurate, 8 fresh AA's x 1.2v would probably leave the green indicator pretty quick. I noticed the green leaving but didn't sail but an hour or so in light wind.