The Foam Instulation has fallen of before 8 times on diffrent space crafts and nothing happened to them. Someone claims to have found a body in the nasa uniform they were in. People have also found hands and arms to people.
Like others have said the 2000 is a decent gun. The 3000 I haven't tried at all but heard good and bad stuff about it. The 4000 I don't like at all, I think the range is not good. The 1000 I think is a remake or similar to the 250/350. I have not modded any of the guns yet so i don't know about them modded.