I read somewhere here ( cant find it now ), a member stated that a curve would equal a 2 percent grade on a flat. That adding that same curve to a 2 percent incline would in effect make the incline a 4 percent. I do not remember what radius curve he was talking about. I have started a new layout with SCARM, and was able to keep my incline to 4 degree's. But in order to do so, there are 2 curves involved, both 24 radius. Is my end result an 8 percent grade?