" DLE muffler will biodegrade before it gets 20 years old" at least they are good for the environment....
I would like to respectfully disagree with you. It is in fact it is a zenoah problem. If a catastrophic problem could occur because the bolts screws came loose in flight, zenoahs should warns the costumer about it, furthermore they should come with a designs that minimize it or prevent it to happens.
I can speak with some authority about it because I have been in manufacturing business for over 20 years and I can tell you, costumers should come first. In my opinion Zenoah have neglected this branch of business which have been working good for others companies.