i have the 7000 in both of my nitro powered planes, i only own one 6100, but i have it on a 43" ws plane and can fly it as far as i have ever flown a nitro powered plane or would ever fly a nitro plane.. i myself, on my property out in the country will be flying a spad with a .46 on it with this rx, and see no problem with it as i will be keeping it much closer than the distances i fly the foamie at.. i am in college and i am just trying to save 40-50$ that i see no reason to spend as the 6100 has more range than i will be needing. i am sorry i ruffled so many feathers, i didn't really mean to recommend doing as i do, just really wanted to state that i, as well as others, have used these receivers full range and i plan to use it on a glow powered plane close in. i will not make recommendations based upon what i do/have experienced from now on, i will simply stick to what the book/manual says.. trajan2000-stick with a full range receiver, it will definitely be safest! btw, if you need to get rid of that "short range" 6100 pm me!