Its just a preference to me. Just my opinion. I am looking for a slim profile. I just sold a couple dynamax df systems today so I'll be getting in line to try out a 20cc. If it works ok in my rascal 110, I'll get a couple more for my 1/4 scale busa J3 and L4. The price of glow fuel has convinced me to start switching over to gas. My favorite planes right now are the rascal 110 and J3. He told me they should be available in a couple of weeks. Just need some deminsions now.
Edwin