Everyone has to realize that these are all ARF kits no one is going to be built like the other. The possibility for the Blasa in one kit to be slightly more dense than an others or more adhesive here than there. maybe the left wing was a differnt lot of balsa than thei right and now its not balanced. Lateral balencing is an issue now. I most defiantly run into all of that in my experience with ARF's and all that makes it to where no 2 planes fly exactly the same. While some people have had issues with their Funtana 40 others swear by them and dont have any problems. One thing is for sure you can get any ARF out of the box and get lucky it will fly perfect for you. But it shouldnt be an expectation to get any plane to perform good 3D weather its a profile, full fuse funfly, or sport aerobatic, right out of the box theres a fair amount of set up required to get it to do that. Obvioulsly some require more than others. I have the Funtana 40, 90, and Morris Knife Profile. While they all have their good and bad points IMO no one is horrible to where I dont enjoy flying it. But IMO profiles are a blast to learn on. It apperars their set up is eaiser and theres not so much to be concerned with.