That picture brings back fond memories. Dan Miner 5th from left was a neighbor when I was a kid (many moons ago) and got me interested in RC. He also got me my first gremlin which I am in the process of getting flying again. Needs a new engine the first one was an old McCoy .35 that I got in a box of goodies from an old modeler. Flew great with a .35 so that is what will go back on it.
Dan told me stories of people flying them with .60's and twin push pull .25's also of a person that had twin fuselages separated by another section of wing and powdered by twin .25's.