Yeah, the wing has had some proven weak spots. If you foam the wing, don't go crazy, you can always add more but you can't really fix it too easily it if expands beyond the strength of the ribs and sheeting. Keep this plane light. People have had success with the DLE 20's, but the thing to do is keep the engine weight as close to the 26-27 ounce total (with fuel) as you can, not sure that's possible with the DLEs or the RCGFs.

I foamed the wing because just taxi-testing revealed how weak the retract blocks were, so I reinforced those with 2oz fiberglass cloth and 30 minute epoxy then decided the foam was necessary. Mine came out just shy of 21 pounds and I can tell you, without significantly more power I wouldn't want any more weight. That aside, people have also experienced in-flight wing failures that cause complete loss of the aircraft, whereas most only experienced the dreaded cracked lower spar close to the retracts in the wings.

I'll look up the 10cc RCGFs. The twin OS 46 AXs I have flew the plane very well once off the ground and out of initial climb-out, but that climb-out being very scale is a bit unnerving to me. That said again it flew great, so now I'm experimenting with props before a power system change.

Got some pictures of your 310?! Hopefully they'll bring this plane back as I don't know of any other nice civilian twins in this size .