Also, there is very little reason to use completemotiontree. I would just switch everything over to newmotiontree for the new animations.
Personally, I just made a commongear.abp and commonsync.abp for each faction.
Thanks for your response! The weapons which I added don't conflict (boys and kar riflegrenade), but it's a risk indeed. I haven't cloned all soldier abp's, so the older default files still use the completemotiontree. I've cloned the completemotiontree however, and it's now exactly the same as the newmotiontree. I know, I'm lazy
It's smart to make these additional abp files per factions, but that would also require to clone every soldier abp.
I will keep your ideas in mind for whenever I get issues. Then I just need to take the time to clone everthing