For proper fingering technique, you don't want your hands to be flopping all over the saxophone when you play, it's inefficient. In ideal circumstances, your fingers would never leave the keys at all when playing. Several really good saxophone players play with poor technique and flop around.
My lesson teacher suggested this solution, and it has been very helpful for me. Tie rubber-bands across the keys in a manner in that they will prevent your keys from jumping up, but won't impact the usability of the keys. For my alto, I ran a rubber band from the top neck screw to the spatula keys (side keys that you use for low notes). I didn't install one on the lower stack, since my hands are pretty solid there.
My lesson teacher suggested this solution, and it has been very helpful for me. Tie rubber-bands across the keys in a manner in that they will prevent your keys from jumping up, but won't impact the usability of the keys. For my alto, I ran a rubber band from the top neck screw to the spatula keys (side keys that you use for low notes). I didn't install one on the lower stack, since my hands are pretty solid there.
