I posted this back in July...
After seeing your post I thought I would give it another try and my opinion has changed, I think my problem the first time was I kept the original screen and added the dome screen, this time I just used the dome and the results were just as good as the pacman screen but with the bonus of the screen being fixed making loading/unloading easier, so I think using two screens when I first tried it gave worse results, it's still a little fiddly to fit the screen but I guess the normal screen isn't all that easy either.
... Of course, your post made me try to find the ideal screen to put directly on the CU
I previously used the liquid pad in place of the CU screen