Another thing to keep in mind with AFV Club is that sometimes larger, flat parts have very big semi-circular nodules on the underside from the ejector pins. Usually you can just leave them be, but some get in the way for fitting the part where it’s supposed to go. Better to always test-fit them to make sure whether or not you need to cut some of those things off.
Yes, fit isn’t Tamiya-like (though it’s never actually bad), but then, AFV Club do give you all the detail that Tamiya thinks is wasted on its customers