Hmmmm... now, I'm beginning to wonder if I should even mess with this. Its turning out to be more effort and expense than I want to invest.
I'm already highly annoyed that a charger which you plug into the TX is an ''accessory'' on this 12Z; it came with a stand-alone charger requiring that the battery be removed from the transmitter each time. Several problems with that, IMO; aside from the fact that I've seen, numerous times, complaints that this particularly battery has a rather short endurance... the 9Z had this issue as well, but was easily fixed. It would seem the only solution on the 12Z is to buy another, extra, battery. Plus, the manual is strictly oriented to 72mHz operation; there is a 20-page supplement entitled ''T12Z Software Update'' that doesn't say jack about handling the receiver. IOW, nothing about mounting it, etc. And there certainly is NO information regarding receiver battery concerns that you guys have enumerated here.
I believe what you are saying. This ''2.4 supplement'' (if that is what its supposed to be) is typical Futaba. Plenty of information, but presented in a manner that assumes the user knows more than he actually does. Seeing as how I'm basically 'flying blind' -i.e., starting from scratch, with NO knowledge of the idiosyncrasies of 2.4- it isn't of much use to me.
So perhaps, before I use it, I should return this radio while I still can... IF I still can.
No doubt I could learn all of this... but between the effort required to do so, and the additional expense of proper batteries/charging systems/etc.; nah, more trouble than its worth.
I appreciate you guys trying to help.