...All the things mentioned, are well known to me...But it is a Mk1...so I will trying everything to get it work again^^ No replacement of a different bladder will cover what the Mk1 bladder is able to, that is the problem, as the Mk1 bladder is different from all the others...
@ isoaker: What about the Power Pak bladders ? just different too I think ... ?
I have already had a try with my glue, at least a try out of desperation. Of course it did not work...
But some hours ago I had a great idea, which may even work^^ I will need some time to try this out and may I am lucky...The funeral is not planed yet!
Will keep you updated. Any reslistic ideas are great and read full of pleasure and hope

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