I have a Sig Ryan STA kit that can be built as a c/l. I was wondering what it would be like to fly a control line plane that large,(72in. wingspan). I imagine the pull would be substantial, especially when the plane would be most likely underpowered with a 60, as the plans show. I know the older SIG kits were built heavy, and this one is no exception. There are lots of blocks that could be lightened, and some changes can be made to lighten it up, but being reasonable, not a whole lot of weight could be removed. I have a Saito 91 4 stroke for it as a RC, and would probably use that if I build a control liner. It is a beautiful plane, at this point I'm not sure what to do.