If you need to glue anything then buy "stormshure" from Clark Rubber. Someone else mentioned it in an old thread and I tried it. I just glued on a valve that was coming away. This glue really sticks bladder material well! You need to leave it to set overnight though.
I've realised that the far tip of the strut has an opening (if you go digging!!). Then on the end near the LE, push the valve through its hole (after tying a string to it).
After that the valve removes easily out of the far end.
Now a new problem...
I've realised that it is not a puncture, but leaking from under the valve!!