I’ve decided to decorate the sliding gate with fencing board from the very beginning. Now the posts were set, the gate was assembled, and the gate opener was installed and powered. Finally, it’s time to start mounting the fencing boards to finish this project! … continue on yu.xueming.org
Update: my blog has moved! Check out yu.xueming.org
Xueming Yu 
Where did you get the nylon roller wheels? Aleko no longer sells them, I unfortunately only bought two, now they do not sell them at that great price
Check out hooverfence.com.
Thanks for sharing this excellent project. Is there a locking mechanism that meets the gate to the opening fence post?
No, there is no lock for the gate. But the worm gear from the motor will lock down the position.