Step 3: Installing the other nuts and bolts
Now its time to pre-install the video projector to the shelf and the chain.
The basic idea with the chain is that it supports the weight of the projetor when the lid is open for the projector. If the chain is not used the hinges will break in a couble of days and you know what happens then. Yes you are right, the old VGA projector will become 3D HD projector for sure...
So. Install the Chain first. The chain could be any color or shape you like but it should be able to hold 10 or more kilos in straight pulling weight. just to be sure not to enjoy FullHD 3D picture instead of VGA.
Drill two holes to the actual case of the shelf and to the lid of the shelf like in the picture 3-4 and then install the chain between the lid and the case. one to the each side so it will look like in picture 5. use wire cutters to cut the chain.(hint. leave few extra loops to the chains lengh after measuring so that you have the possibility to adjust the lenght afterwards for longer and for shorter lenght.)