RE: PA mini Katana vs ExtremeFlight Extra
I have the Katana, and absolutely love it. There is nothing it can't do. However, I've heard the same thing about the Extra. So, what I think it comes down to, is how much money you want to spend. The Extra is bigger, heavier, and therefore requires a bigger power system than the Katana. What you might consider doing is sending Scott Stoops an e-mail or PM. I don't think he's on RCU but he is on RCG as Sukhoi26 or something like that. He's flown and reviewed both the KM, Extra, and BME Yak for Fly RC, so he could give you the best run down on which he likes best.