I can upload close up pictures of how everything is installed when it's light out. If you want to see some videos, emerald kingdom greenhouses uses the same motors and stuff. Farmtek sells the motors. They are all over ebay.
A bunch of local greenhouse companies use the same system. It rolls up as down. Anyone using a rolling system uses those motors. The arm hinge is literally a bolt.
It works well and it's sooo simple stupid. It's never gotten stuck. I haven't had to make repairs and non of my friends have either, but it's so crazy simple you can do the repairs yourself cheap. I have only had it for a couple years so I don't know how long motors last for but so what if it craps out on the third year. The motors are less then 200$ to replace. Call it maintenance cost.
I had to buy a kit from emerald kingdom to find out how easy it is and how taxed it was.