Glad you think so, let me know how it works. Changing the eye-piece fit dimensions is fairly trivial, I would just need an accurate measurement of the diameter of the eye-piece you're trying to fix. The only caveat would be that the new model would be "first to try" since I wouldn't be ordering a prototype from Shapeways first.
I recently upgraded my phone to a Galaxy S7, so I'll be making a new adapter for it in the next month or so, I have some ideas on how to make the eyepiece socket adjustable to lock onto a wider range of eyepiece diameters. If that design works, I'll probably come back and upgrade this one to use the same type of socket.