Hi guys,
Well, I guess I got a set of A4 projectors for my retro (since the A6s are too large). However, I'm confused. The FAQ clumped them up together and I'm looking at these pics in particular:

and

There's that funky clip thingy that is in the first pic. Is that something that can be taken off (since it's not in the second pic). Also, is there a difference in A4 and S4 projectors or are they exactly the same? Thanks!
Regards,
Mike