Hi,
Is anyone able to shed light on how bladder ends work. There seems to be two main methods, the fold over method, where I gather the bladder fills to the point of the fold, rather than to the end of the actual bladder.

The other method is the elastic tuck method used in zip ends where the bladder tucks under some elastic. With this method the bladder fills to the point where it gets tucked under, although I'd imagine the elastic would stretch meaning you could end up with a sausage situation happening in the end.

Is one method more susceptible to end blow outs than another.

Thanks.