I am not all that surprised at a weight of 8 pounds 12 oz. Does the airplane stall abruptly or stall to the right or left? Are you using spoilers or flaps?

The beautiful airplane below flew once with a turbine and was retired. It also came in way too fast. The airplane is sheeted and painted. The weight is 6 pounds 8 oz without gear, without engine, without rudder servos and without other equipment. If an all up weight of 9 pounds (31 oz/sq ft) or so can be achieved some experimental flights will be attempted. I anticipate using snubber brakes, a slight amount of spoiler, and flaps that are tied down.

Bill