Yep, that sounds like my Tiger 120. It is made of 'light ply' but comes in there pretty heavy. But the thing has such a large wing that I'm sure it would fly with a rubber band..

80" span, 1,143 sq. in. The specs say 11.5 pounds, but I imagine it's much heavier than that. I would guess around 13 pounds or more.
Even with that extra weight, though, I must admit that it does fly pretty well. It floats in for landing and landings are very solid... ha.. I guess so, when it loses lift, well, it ain't about to balloon up again.
CGr.