Kyosho Sukhoi
I have one with an OS .91 Surpass. I mounted the servos in the tail. Balanced perfect without added weight. I added VG's to the wingtips.
It flies really well. The only complaint I have is the gear plate in the fuse promptly let go when I landed a little harder than normal. I haven't fixed it yet because I want some composite gear and I haven't gotten to it yet. Once I do, I think it will be a great flyer. I have flown it with full up/down and no snapping is appearant.
I guess the only thing I may suggest is try to lighten it somehow. Mine is 5.5lbs and I cannot complain.
Hope you do not abandon it before going light !!
AcroFlyer