Windows 7 - Ceiling Mount

The question doesn't really seem to fit elsewhere, so I chose to ask here. I just got a VideoSecu ceiling mount for my HDTV, and it has two sets of mounting holes in the portion affixing to the ceiling. One set is just 3 holes down the middle, which I assume were intended if mounting to a stud, but there are 6 others outboard of these at ~ 8.25" x 1.75", which appear to be for attaching via hollow wall anchors that are provided. My question is simple...is this really an adequate area to provide a secure and solid mount for a TV and mount weighing ~25lbs, and hanging on an arm extended ~34"? I'm not as concerned about the weight, as I am the leverage placed on the ceiling with typical pressures imparted to the TV below. I know that it is possible to add a stud in the ceiling to mount to, but with my health condition, I would like to avoid that task if practical.

Hi.

Did you not get a "comprehensive product installation manual"?

I can't remember the last time that I got a comprehensive installation manual for anything, much less this. Yes, there is a one page installation sheet, simply showing how to assemble the mount, but nothing about selecting a method of attaching the mount.

I think that I've figured out what I will do. I found a couple of short pieces of 1x12 in my scrap pile, and I shall nail them together and place them in the attic above the mounting point to add strength. It may not be necessary, but I would rather be safe than sorry.