RE: I my climber....
I love my Summit Viper X4. it's wisper quite and once you spend the time to get the stirrups in just the right spot it's a dream to climb with.
Another thing, Always use an umbilical cord to connect the top and bottom peices. Last week I had my feet dangling over the front and when I pulled them back up it lifted the front of the climber up and it slid down the tree. Had I not had the umbilical cord hooked up I might still be in that tree.