Of course, there is no way of knowing what they do. But should they "break" something, and then make a post in the forums saying "This part of the aircraft doesn't work and here are the steps I went through before the problem came up" without mentioning the modifications they made, and then we try to recreate the problem on several different machines, it's a safe bet it's because the user made a change somewhere in the add on or there is something seriously wrong at the user level. If we can't recreate the problem, then there is nothing else we can do. People need to understand that when they mess with something, they take all responsibility for it. If someone makes changes, they should not expect help from us because it is simply wasting our time. I don't have a problem with people breaking down any add on I make if they want to learn something, but there is a very clear line as to where they should stop. Not meaning to sound grandiose, but when a developer or development team spends 3 years on a product, 7 days a week, it's probably not a good idea to mess with anything in the final release.