I am trying to convert flak cannon so it's shell will gib into dropship door (attempts to make it shoot the darn door itself end messily because of it's mass as I figured out), so I CAN HAS REVENGE on all the dropships. :E

Incredibly, I even made it so far that CC loads (which almost never happened before when I tried to "mod" something ), and the shell actually gibs into the dropship door. But this is where the troubles begin: it doesn't fly where I intend it to fly, i.e. where the shell was flying. Instead, it always flies to the right (which again ended messily first time I tried to shoot horizontally to the left >_<).

So my question is: what the... ugh... what am I doing wrong, and how do I fix this weird behaviour?

Well, there's a few things you need to do. We'll look at this example gib code:

To ensure that the spark flies at the same direction as the object that spawned it, it needs to look like this:

And that's about it, really. Max velocity is 0.001 because i have bad experiences with it being 0. Also, be sure to not include the arrows.
If you have something that says "InheritsVel = 0", then remove that line, as it makes the gib not inherit the objects velocity.

Hooray, it works now! Thank you!