I have a twin ring 31cc Ryobi in a CMPro 140 Giles. [link=http://www.cmpairplane.com/G-202-140.htm]CMPro[/link] I have no taco to tell you what speed it is spinning but I have had an 18x8 and currently have a 17x10 bolly which I fell is giving me a bit better speed and good vertical. Not quite light enough for 3D. see pics.

I have another freshly converted twin ring that I will be taking a fair amount of excess weight off. I was considering putting in the H9 FuntanaS 3D 60-90 [link=http://www.horizonhobby.com/Shop/ByCategory/Product/Default.aspx?ProdID=HAN2675]Funtana[/link]. With the wing area and weight of it I think the Funtana has to be a good combo. Another contender is the Ultra-RC Ultimate Giles[link=http://www.ultra-rc.com/giles/index.htm]Ultra-RC[/link]