Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Can this rotate left / right? I want to use two diagonal holes in the mounting plate into a ceiling stud. Bottom half would need to turn 45 deg
Document: Very solid piece, had a home theater place put it together so I can't comment on that.I will say that you have to be pretty dead on with it's mounting as it won't allow much wiggle room for your PJ left or right. This caused a need to relocate it a few inches and even then still not dead on for a perfect picture placement. Close enough, but I should have gone with one of the $100 mounts that allows for some horizontal movement of the projector rather than just swivel/tilt
I use this mount with an Optima HD20. It includes multiple screw sets for different size projector mounting holes and 2 allen wrenches. The only tools I needed were a phillips screw driver and drill with a small bit for pilot holes where I mounted it to the ceiling. The instructions are minimal, but it is not a complicated assembly. The mount is designed for a projector with four holes, but my Optima HD20 only has three.
The Optima's mounting points are much closer together than the arms on the mount, even when using the two supplied short brackets. However, after thinking on it for a day, I was able to reconfigure the mounting arms to work by removing all the  arms, attaching them to the mounting holes on the projector, then reinstalling them to the mount backwards, thus shortening the distance between the mounting points. In the end, I used only three of the four arms, and it works perfectly.
Well constructed and very versatile mounting positions. However, it did not readily fit my Epson 3020 projector. The adjustable feet did not extend far enough to cover the Epson's mounting holes. Since I didn't find another adjustable extension mount that would work under $100, I decided to make it work. Went to Ace hardware and got some angle iron with mounting holes (the kind used for mounting garage door openers, but a little smaller).
Have an optoma projector with 3 holes. Takes a few minutes to figure outnhow to arrange but fit fine. The top plate was welded on an angle so i had to twist the metal frame a little to get a straight picture on the wall. Overall it is a good value and comes with all the hardware you need. As it is not very sturdy i am sure i will have to adjust the brackets once in a while,but thatbis minor.
Just do it slowly with high torque  or use a hex nut .Like I said earlier, don't rely on the manualHeight adjustment is limited . Minimum of about 6&#34; height, then your other choice starts from 16&#34;. In my case not a big deal, but you may need to know. I personally didn't use the extension armTook a star out for above 3 reasons.Here is a simple configuration to be used for BenQ W1070Benq 1070 comes with 3 holes in an asymmetrical mode.
Align one arm with a hole on projector (this is the one on center (relatively speaking)).Replace 2 other arms with Small arms that came with. One small arm is almost all the way in and other small arm is somewhere in the middle. Align the holes with projector and put the screws it came with.The middle piece that connects the projector to the ceiling plate can be adjusted both horizontally and vertically to some extent.
When opening the box, it seemed like there were enough configurations that installing the projector to this would be a snap. It actually wasn't. Installing to the ceiling was easy enough, but trying to balance the mount with a center point on the projector and trying to use the small and big adapters proved to be very difficult. At the end, we ended up using 3 long parts, 1 short part, and have a unbalance install.
Once it's perfect - HANDS OFF - or it'll be pointing and inch or two off.It does what it's supposed to and didn't cost a fortune. It's useful to have some assistance to put that heavy projector up in the air. I recommend it for anyone to use.
Unfortunately I found out this is not a universal mount as such. I have an Epson PowerLite 3020 which is a big projector. This mount could only reach 3 of the 4 mounting screws - but unfortunately only on one side at a time (4 of the holes are a square on the corners of the device, 1 hole in the front).
Answer: There is minimal rotation. You can tip it up and down and a little sideways.  The Manual does not recommend using this mount if the projector does not have at least three mounting holes. Go to this link to get more details: http://www.qualgear.com/productlist.php?catid=56