Thinking of launching a product on kickstsarter I designed for a new prostate massager, feedback on the design would be awesome!?

Hey guys, I have been an aneros user for about a year now and I absolutely love the products!The only problem was i kept having to adjust them to get them to the right length to hit my prostate. so I have designed my own, as experienced users I would really appreciate your feedback on the design please and where you could see improvements? The design is here www.lingaman.com
Thanks