I have gone through 3 diaphragms for my [words=https://www.internetzahlung.de/cc-aktuell/bestellung.php3?PID=PM0440A&Sprache=en]PMP[/words] and I have only used it for about 30 hours, so basically i am getting about 10 hours per diaphragm. I don't know if i got a effective batch or not but all I know is that I don't want to order another set of diaphragms for $50 and have to wait 10-14 days to receive them. So I am here wondering if there are any other items that I can use as a substitute for the diaphragms for the [words=https://www.internetzahlung.de/cc-aktuell/bestellung.php3?PID=PM0440A&Sprache=en]PMP[/words]? (ex. a water balloon or something like that). If anyone knows of anything that I can use as a diaphragm that will last decently long and not break in 10 hours of using it please let me know, I would very much appreciate it! Thanks Bros!!