It occured to me that in a 2-line spinnaker system (tack line + halyard/dousing line), that

• There is a slack sucker bungee to take slack out of the dousing line.
• There is a bungee to take up the slack from the tack line.
• And the 2 can be connected.

The neat think about using 1 bungee instead of 2 is that pulling the tack line eases the slack sucker bungee exactly when you want. The advantages of easing the slack sucker bungee are:

• The lack of tension on the halyard means it does not want to wrap around and grab fingers/hands during the hoist/douse.
• The lack of tension on the dousing line prevents it from deforming your spinnaker shape.
• You can use a more substantial bungee for a tidier boat.
• You might be able to eliminate the bungee altogether, and use the tail of a long tack line to suck the slack out of the dousing line.

Since I don't have a snuffer on my boat, I wonder if anyone else has tried this, or is willing to?