I have a Venus too, and got this weird sound too, until I change the steel rod for standard yellow nylon control rod.

The sound is "normal" on the Venus, but not good for a long time. Sound come from your 3 controls steel rods vibrating in the plastic tube. Your steel rods are 1/8" and the plastic tube not far from 1/4" round! You can replace your steel rod by standard yellow or gray Nylon control rod, no more play. Or by carbon control rod or just put some "nylon spacers" on your steel rod every 4". It will remove the rod vibration.

Check attachment