well i've seen guys that use those orings to secure the foreskin once it gets long enough to stay over the head. this will keep the end of it tight and "Train it" to stay that way (for the most part). that is one of the main things with restoration, is that sometimes it can be a loose foreskin...
good luck and keep with it. Ive been doing some manual and looking to get a device. you should post some progress pics, id be interested to see how its going.
-jc80