I have attempted to start discussions about stock firmware as well because I have 3 stock ones. I get along with the basics just fine , but most of the higher program functions leaves me asking more questions than anything. Mist times the answer is the same: update to er9x or other firmware. The above link isn't too bad at all considering what you get. I also tried to become member of that usergroup, but failed.
I will soon update all 3 of my TX to the SP and er9x mostly becuase I want more model memories and I am running out. It's too easy to buy planes and a $9 RX and fill up a memory slot.