I've just done the hack to my Gemini II and it's working great!
The guide and the pcb picture on page 2 are spot on.
Bought the V8 module and two receivers from
http://www.giantshark.co.uk/
I took some snaps too while I was doing it to show how it looks installed. Here's the link to them...
http://photobucket.com/Sanwa_Gemini_II_FrSKY_hack_mod
For the daughter board, I wedged in a chunk of foam rubber that holds it in place (black and yellow thingy in the pic) rather than using silicone or glue. No mess and the button action is solid, no play in it at all.
Got a great tip off Mr. Chimp to dremel down the lower brass nut for the aerial, instead of opening up the existing aerial hole in the case. Fits snugly in there now and if I wanted i could return to stock (except for a couple of 3 and 3.5mm holes in the back)
Thanks to all who have contributed to this guide, top work
