A Funtana with a Saito 82 will be great, the engine has more output than the OS70, the YS 63 is a great engine and some people who owned both (YS and Saito 82) says its the same. I flew my Funtana on a 46 2C and it was more than enough for sport flying doing IMAC stuff. Too bad mine went in because I did not check my RX ariel properly ... oh well it was a really nice plane from the few flights I had. Personally, I have had 2 H9 and seeing what they are like I prefer them over GP planes ... (now I will get bashed!!!)

Funtana structure is good enough, I have a friend who flies it like mad with a OS70 Surpass II and there is not a structural problem, he says he would rather have the Saito 82 in it.