That' s great to know. I have a summit viper. Anyone know why it slips on smooth bark trees? The bottom platform will drop up to an inch and the top just falls if there is not weight on it. Even on rough bark trees I sometimes get some slipping. I wonder if the teeth need to be sharpened? My stand is two years old. I saw a picture of a newer viper an it looked like it had a additional row of smaller teeth inside the larger teeth. Mine doesn' t have this extra row.