[Shop-talk] genie garage door opener installation?

[scott.hall at comcast.net]

as always, I have the obvious question: 

I read the directions back and front, and don't see it...at what point does the assembly get attached to the ceiling? I'd think assembling the motor and rail on the floor and then lifting the whole thing would make the rail get misaligned. on the other hand, it mentions turning the motor and rail over a few times in the directions. 

right now, since it's not mentioned, I'm assuming the whole thing is assembled on the floor then lifted into position. has any one installed one of these things? 

hints, directions, etc. gladly accepted. 

thanks. 

scott