I don't have any kind of extender and I've never used one. But I do want to comment on a question asked earlier. Someone asked if you could stretch to 7" soft if you would be 7" hard. This hasn't been my experience. If I measure from the pubic bone and stretch I can get 7.5" length. But my average erect length from the pubic bone is 6.4-6.5". Just my two cents.