PREFAB_PARTICLE and MODEL_MULTI_PARTICLE question

[linuxgurugamer]

In my work of updating a mod, I've been using other parts as models.  To make the engine exhausts look good, I've converted a number of them from ModuleEngine to ModuleEngineFX because the old animation was extremely large and unusable (I don't know if there is a way to make it smaller).

I have the engine exhausts working nicely now, but I found that the smoke exhaust was not going in the right direction, and that the position of the exhaust was off.  After a lot of searching, I found the following which are not documented other than in the API docs, which don't have any description:

In the MODEL_MULTI_PARTICLE, I finally found that to adjust the position, instead of using localOffset as used elsewhere, I need to use localPosition.  This parameter is not listed in the wiki

In PREFAB_PARTICLE, apparently there is a parameter called localRotation, which is a Vector4. I haven't been able to find anything worthwhile about this other than this is what might need to be set.  

Any help would be appreciated