I am assuming when you feel "Uneasiness" on curves it feels like you are going to roll the Spyder?

Its amazing what tire pressure ,car tires, Rons bar, Rons shock adjusters will do for the ride.

I think the big difference was the tire pressure and went to car tires,next would be Rons bar and shock adjusters.

I dart across the Hwy with little effort now.

Good Luck.