I once rigged up two “head massagers” with a splitter which provided a very different stroke. The top one had an end cap and the lower one just basically pulsed with the liner inflating and deflating. So you ended up with squeeze and release action at the base and a short stroke at the top. When I attached a small piece of liner to link the two pieces together it produced an even more intense feeling. Sort of a hassle but it did work and provided me a little variation in my normal routine.
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PULLED BY KAREN FROM THE YAHOO GROUP