Well, I can account for some of the extra weight on my hog, BUT NOT 2+ lbs worth!

Saito 100 +5oz & heavy prop +3oz(?)
Aluminum motor mount +2oz (?)
Heavy duty servos +1oz
Oversized receiver pack +1oz
somewhat heavy pilot +2oz
dual aileron servos +3oz
fiber-glassed center of both wings +5oz(?) <-- edit: added this info

This may be a little bit of a stretch, but that puts the plane under 8lbs. I have no idea where i could scrape 8+ more ounces at!! Maybe since i used wood glue or Ultracote covering?? Who knows, this topic has always kinda boggled my mind. I didn't have to add any extra dead weight. When it came time to locate the servo tray, the plane balanced perfectly, So the servo tray went on the aft side of the CG and the battery went on the forward side of the CG. But since my hog is so fun to fly and still floats through the air pretty well, i am not worried about it in the least, just more curious than anything. I was very surprised at how much this plane floats. It gets off the ground at about 1/3-1/2 throttle and i had to make 4 landing attempts on the maiden flight because it didn't slow down like i thought it would!

BTW SeamusG, this is my second Sig Kit and my third Sig plane...i don't blame you for liking them so much! They really do an awesome job and their customer service is great, not to mention they are a relatively small AMERICAN company! I will support them for a long time to come!