It's not A hard plane to fly, it's just different then A stunt plane or A floater like A Cub. My GP kit built had an OS 70 FS and that may have been over kill?? I learned A lot from that plane before I killed it.
GA, if you go over to the Classic Pattern Forum you can find A sticky {I think} on the Kaos and other types of the old pattern planes. Don't ask questions, just read what the guys are saying, think about it for A while then start talking to some of the guys like Rain Dave, really good people with lots of info to share.
You may want to give some of these older style of pattern ships A try, much cheaper and easier to get into.
I still have my old Bridi 60 size Kaos, it's getting rebuilt and covered for the third time.
When I have been having one of those really bad days like Chuck mentioned {yes, we all have them!! }like when I stuffed my newest scratch built Extra, I will not leave the field on A nasty note like that. I fire up my old Kaos and Fly Like the Wind!!!!! I tear giant holes in the sky and impress myself!!
How can you do this you ask:: It's not me, it"s the Kaos, it can't help itself, they just fly.
The only ARF of this plane is the 40 size from Tower but not to worry, the Kaos has grand children, lots and lots of grand children so there are many of these types to choose from.
The Kaos was the pattern Champ in 1970 and for many years after, it is still A good plane for entry level pattern or IMAC if that's all you have. It's grand kids are A better choice but they are out there and not over priced.
I even have an old 120 size Kaos going through A rebuild, that's how much I think of this plane. Give some of the fun fly planes A look too, I still fly A real stupid Hots.
Go take A look at the Classics and give that poor Decathlon A rest, you may want to visit it again down the road.
CHUCK, how was that for some Pearls of Wisdom???