Ok,
I road the Kury switch blades for about 600 miles (a lot of 22 mile rides and a couple 100 mile rides.
Today I put my stock pegs back on and took a 97 mile ride.
I never had the switch blades come loose and rotate but I did tighten them pretty good.
I think I have decided to keep my stock pegs on the bike for my typical riding and keep the switch blades for long trips. They are easy enough to switch.
The issue with me is the switch blades tend to push your feet back and I'm six one and like to streach out when riding. The switch blade also makes it harded to push the brake pedal cause your heel is caught on the foot rest pices which is further back so you have to reach futher with your toe to push the pedal. This is what I liked the least.
As far as slipping of - I never had my foot slip off but, they occasionally made me feel like (mostly at cruising speed - 80) I could slip off more easilly than with the stock pegs. I didn't have any problem shifting.
I like the stock pegs the best.
I wouldn't purchase them again. They are made really well with good chrome application
Gary