Curtain rails for my Xiaomi Aqara curtain motor arrived!
The good. The rails are silent and look very durable.
The bad, it came with no instructions! I mean seriously, took me over an hour trying to figure out how the thing operates. Assembled it fine but found it would only close properly. Opening had issues.
I disassembled the rails completely to understand how it worked before realizing the belt was not joined to form a continuous loop This was why it could not open properly.
So I rummaging the bubble wrapped bag of screws meant for mounting before spotting what I needed to join the belt.
LOL Noob problem!!

So guys, take note!
Anyway it works!!!
The motor stops when the rails reach the end and can successfully open before stopping once it fully opens.
Another bad thing about the rails was the seller promised custom sizing so I ordered 12 feet in length. However it came in 4 meters. Now I need to dis-assemble it again, cut the rail and belt and hope i get my measurements right, so it all fits nicely again.
I'm sure curtain ppl can do this with their eyes closed, but I doubt they will help as I didn't buy the rails from them. Thankfully, my dad has the cutting tools to make a clean cut on the rails.