I've been trying to fit this addon into a MP server.. In singleplayer / offline mode it works without issues, but as soon as i add it to a mp server, the helicopters wont take off, engines are running fine but it's like something is holding it down and it says constrained.. I've been trying to figure out the cause but to no avail? Does anyone have a fix for this... Please let me know. Been trying to remove all kinds of contraint but still not working.