Luggin' a 1GM sure is hard on motor mounts and the hull under them....

I think the prop should be small enough to over-rev the 1GM by 5% without
creating a huge cloud of lampblack.....

A too-big prop isn't going to create more power. Maybe that's what they
think. A 3GM adds more power....(c;

All makes sense to me. I'm not sure I could stuff a 3GM into my little S2,
though. ;-)

Take care,

Frank