Here's a question for all you master builders.
I have a SIG Extra300XS with a G-26 on it. The engine puts out 17.2 lbs of thrust but the plane weighs 15.2 lbs.

The Manufacturer say it should come out about 13 lbs.
How do I get it back down to the weight that Sig says it is supposed to come out?

I didn't do anything that I can think of that would cause it to weigh so much. Wassamatta? I did add a bit of reinforcement to the firewall but not 4 lbs. More like 4 ozs. The G-26 doesn't weigh 4 lbs more than a 2c 120 size engine. This has got me stumped. The plane flies like a rocket but vertical is BLAHHHHH!

Any ideas on how to reduce wing loading would be really appreciated.

JimRoss