Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: does this pivot at the base where it attaches to the wall or only at the end which attaches to the projector.  I have an epson 3020.
Document: This is holding my Epson Powerlite 8350 as a wall mount and I didn't have any trouble with the adjustments (but I did replace all the screws directly holding the projector).
I chose this mount after reveiwing all available mounts for Epson 8350. Fully satisfied with the quality and flexibility it offers. I installed the mount on the back wall to keep the projector closer to ceiling.
This projector mount is sturdy enough to hold large projectors, in my case the Epson 5020. The design of this mount makes it difficult to adjust the projector to the right level. Though I don't have experience with other mounts.
This mount worked perfectly for me since I needed the projector about 12" below the ceiling. It is a fraction of the price of a mount you would find elsewhere. I did have some problems though. First of all I had trouble getting it to fit my Epson 707 projector. This mount is made for projectors which have mounting holes in four corners. Mine has two holes in the front corners and one in the middle.
I bought this to replace an older projector mount that wasn't large enough to handle the Epson 8350. It is very flexible in terms of orientation, and the size/nature of the projects it could attach to. It also appears to be very sturdy, although to be sure I'm not using it at the full extension in vertical orientation, so I'm not sure how much vibration/wobble it might be subject to if you had the positioning arms extended to full length.
When i got my first cinema projector, i bought a specific mount from Chief. Sturdy, sure, but when that projector died, I had an expensive lump of metal that nobody wanted.When that old 800x600 projector died, I bought this mount, with the idea that once i upgraded my projector, i can reuse it.It worked fine for that old HP projector for 2 years. Finally, I've gone high-def, and I bought an Epson Powerlite 8350 projector.
My first time using a ceiling mount, so I have nothing to compare it to.I used this mount for an Epson PowerLite Home Cinema 8350, and found it to be a very high quality product. The instructions were clear. The projector adapter mount came with many screw types for different projectors and I had no problem fitting it to the Epson. The mounting brackets seem very sturdy and are easily assembled with machine screws that screw into threaded holes in the brackets.
Works as advertised. Sturdy construction and well designed. Easily adjustable for all projector sizes. Wall mount works great. I used different bolts for my concrete wall but it.comes with bolts in package
And it has been up for a week, hasn't fallen down, and does not appear to have shifted.Here's what I didn't like:  First, this mount is not really designed for use with a suspended ceiling grid. The installation manual describes only drywall over wood joists, and concrete installations. Same for cantilevered (using an included right-angle piece at the projector) wall mounting.
This is an outstanding mount for projectors being hung from the ceiling or wall. Features I particularly like include the safety hanger for attaching the projector to the mount, and the telescoping C channels for concealing  the cords to the projector.To use the safety hanger you first attache the spider to the projector, and then hang the hook over the two screws on the mount itself.
Answer: It does not pivot at the base.  If I am not mistaken it did come with an attachment if you are attaching the mount to a sloped ceiling (I did not need one).  Between the mount and settings on the 3020 you can hit just about any position on a wall.