Lowerable Ceiling Projector Mount for HD8300?

Hello! I just bought an Optoma hd8300 and, since I'm leaning towards a hi power screen, I'm looking to get a ceiling projector mount that could be lowered into the prime projection area but raised up to the ceiling when it's not in use. I don't need it to be motorized, I'm totally fine with manually raising/lowering it, and would also be fine with DIY, but for either buying one or building one, I'm having a hard time finding what I'm looking for. It looks like most of the adjustable mounts are more of a "adjust it, then leave it" kinda deal. The one I found that actually went up and down was motorized and cost $1000 (I'm leaning towards $200 max). I imagine it'd be pretty easy to make one, but it'd probably help if I knew what to look for--the best idea I've got is to use some sort of inverted scissor lift contraption, but, frankly, I don't know where to begin looking for such a device. Any help?

Furthermore, I would welcome some input on my proposed set up. I went with the Optoma and hi power set up because I am a 3d fan. However, if I were to go with a screen that didn't require such stringent projector placement requirements, I could go with a normal ceiling mount.

It looks like vertical placement for the 8300 might be kind of restricted, so the hi-power screen might not even be an option (I'm going to keep researching this). Anyhoo, I went for the Optoma because it's a DLP (I, like I said, am a 3d fan and want to minimize cross-talk), has a dynamic iris, and, at the $1750 (refurbished) price I just paid for it, seems to be a good deal. This will be my first projector, so I'm excited and curious to see what I think of it. If there's another DLP out there that has good black levels and contrast and is around the same price, I'd be eager to take a look.

The screen, for now, will be a 106" elite manual with a 1.1 gain. It seems good enough for now, considering the price ($130) but an upgrade down the road might be in order.

Thanks for the link!