RE: Goldberg Extra 300
Sorry for not telling about the weight. Look my plane is scratch built. Let me tell you how it born. When I was still at school I've worken on summer in a hobby shop to get money for my hobby, the I get the plans of this plane and I decided to build it as cheap as I could. SO I went to one of those stores where you buy everything you need to make homeworks as drillers, wood, saws, etc... For that reason the fuselage was a little over weight. Then the wing was made with foam (not high density) with balsa spars and sheeting...MORE OVER WEIGHT. So... I hadn't weight my models but it was a stone... Any person who had llift the plane said "ohhh, It's too heavy".
That's the reason why I changed to g2300 but the Ryobi in first time was youst buecause I wanted a gas plane with a cheap engine (a lot of people said it was ridiculous to install a gas engine in this plane... that it was too small... It flies well with any powerfull engine).
I guess my plane weight around 11-12 pounds when it crashed.
I'll try to weight the pieces of the plane.
OldScaleGuy... can you post pictures of your plane?