This is just about the tiniest, most useless nitpick in the world. But I'm still gonna report it.
On the CSLA M1 and M1IP, the left rear tow ring is slightly offset from the thing it attaches to on the main model. This results in a small gap between the tow ring model and the main model.
This has absolutely no effect on the gameplay - but it's a total "once you see it, you can't unsee it" thing, and hopefully a simple fix.