So here's what I came up with.
Constructive criticism welcome :)
Step 1: Materials and Tools
2 x D32 PN16 PVC pipe (2.5m). - These I bought.
2 x Blind kits. - These I bought too.
1 x piece of 16mm solid wood. You would need around 10cm x 28cm. - This I had at home
4 x long screws and plugs to hold the backdrop to the wall - These I had at home.
16 x wood screws (25 - 30mm long). - These I had at home too.
Cordless drill (used as a screw driver)
Step 2: Cut the Wood
Step 3: Build the Support Sides
The only important thing to keep in mind is to pre-drill your wood.
If you just force the screws into the wood, you are most likely going to end up with a cracked piece of wood...
Step 4: Attach the Sides / Support to the Wall
Bear in mind this backdrop has a fixed length, so a miscalculation would most likely result in either cutting the pvc pipe a bit, or in drilling new holes on the wall.
I did make a different mistake though.
I did not consider the thickness of the wood, so the length of screw that actually went into the plug was too short, and the plug did not expand inside the wall.
The support came down... luckily I realized and corrected it before disaster could happen.
All I needed to do was drilling the holes wider to embed the head of the screw halfway into the wood.
Step 5: Final Assembly
One of them was a bit loose (risking bad traction when pulling the backdrop up), so I just used some masking tape to adjust it.
The screw heads embedded in the wood made the whole assembly much more solid.
I deliberately placed the pulleys on opposite ends so avoid the chains getting tangled.
All in all, the whole project took a couple of hours to complete.
Now I need the white and black canvases... and a model, of course :)