Guys, like I said above, the G23 and G26 are virtually identical engines as far as weight goes and after I converted my G26 to Electronic Ignition it came up a little over ten oz. less. I cut off a bunch of other dead weight (The back of the crank is steel and is not needed - that is a lot of weight right there) and got nearly 8 more oz. off. I don't need any tail weight now and it fly's much like it does with a four stroke on it. Take the six oz off the tail and a pound off the nose and it makes a significant difference in the way she flys. The G26 is a lot stronger engine than the 23 and almost as strong as the G38. Mine has a better exhaust with slightly more compression and not that it makes any more power but it also has the EI. It turns an 18X6 9600 rpm's on a bad day and 9800 on a good one. Those numbers produce close to 18 lbs of static thrust and that is a ton on an 11.5 lb plane. The plane I am refering to is the one in my avitar. The only negative I see with the G38 is weight. It weighs more than the G26 by a fair amount and stock the G26 is already just a tad heavy for this plane unless you shorten the nose. The G38 may need some pruning to make it work out good.