I'm actually enjoying this back & forth about Vader's dome. When I was a kid, I thought the only real changes to Vader's look throughout the first three films was that his armor got shinier &, perhaps, David Prowse's eyes became less visible after ANH. I was oblivious to all the little changes that were done &, as a result, the myriad of slight variations we have seen reflected in decades of merchandising.
Fast forward to a just several weeks ago (& over a year after this figure was released!), I thought there was nothing that could be done to make the original Sideshow dome workable on this Vader figure. Then, when folks started snapping photos of the Emperor with Vader & I started seeing the little improvements that were being done, that's when I took to tweaking my own Vader again & realized how good this figure really can be.