Complex sentence: This may make it problematic if the force of the player's fingers can alter the relationship between keys as they are playing by bending them, having a potential negative effect on the correct sealing of the pads to the body of the saxophone.
Split into simpler sentences: This may make it problematic if the force of the player's fingers can alter the relationship between keys as they are playing by bending them. This could have a negative effect on the correct sealing of the pads to the body of the saxophone.