I've noticed the misaligned tracers too but it only seems to be on the Alouette III with cannon, the version with a MAG seems okay. I've come across a couple of other bugs also:
Parts of cockpit have textures that are partially transparent. There's an example picture below taken from the Alouette II, but the problem also occurs in the Alouette III's cockpit.
Also, the model doesn't appear to be affected by shadows either. The chopper casts a shadow on other objects fine, but the shadows of other objects, and the choppers' own shadows don't effect its surface.
Textures and models are great though guys, and I'm really looking forward to more of your addons; especially the islands/environments.