To have this multiplayer compatible, I need to set the mod to "require" all of the vehicle mods, because the server code is not smart and needs to be spoonfed what to do, unlike singleplayer. This would mean that everyone using this mod would need to play with all of KI5's vehicles, which does not fit everyone's preferences.

There is the option of separating the mod for each vehicle, like how it was initially. However, it is not convenient and adds 20+ mods you need to enable.

Multiplayer is not my priority, and convenience is, so I am going to keep it the way it is. I am down to help someone upload their own multiplayer-compatible version of this mod, as it just requires moving lines and I already finished the hard part. I really dislike having duplicate versions of things and try to minimize it as much as possible, hence I won't do it myself.

You can discuss this below.