RE: 8611a vs 8711
Miguelito,
I've been using 8711 on my Aviation Design Mirage 2000 now for a year and I couldn't be happier. The voltage concern that you read about is really only on the big Flip Flops that are constantly hammering the servos. I'm flying all my jets with Fromeco 5400 packs and I get 7 flights before I even start thinking about charging the Jet. I don't know how you're setting up your Rafale but the Mirage is very critical when it comes to the elevon because it's a really big area that a single servo has to move. The 8711 is now on all my Jets and I'm very happy with them.