Installing a Bifold Door

[Greendragon]

thank you for quality video, quality audio, and getting straight to point!

[savethefails]

"Hi yall, let us show you the least amount of detail required to install a product that requires far more details. We want to be sure to appear as though we care about your ability to install these. Let's Go!"
Step 1: Perfect World!
Step 2: Install Doors!
Step 3: DONE
Step 4: BUY MORE DOORS!
I mean, did anybody there actually believe that this video was helpful?

[scotm]

This is the 3rd Jeld-Wen bifold door installation video I've watched and when it comes to installing the aligners the only thing you get is watching someone attach them. Should I attach them at the top? Middle? Bottom? Should they line up door to door? Are they necessary? Will the doors function properly without them?
Also, when I drop my door onto the lower pivot bracket is the bracket supposed to be so loosely screwed into the floor that it moves when the door is lowered onto like it does in your video?

[mrbreezeet]

On the top inside pivot bracket closest to the corner of the jam anyone happen to know the size of the screw that tightens it down?
I did a stupid thing and lost the screw and don't feel like paying $8 for another kit.

[bonnenaturel]

Really? no shim under the bottom metal piece that is going to have pressure movement when opening and closing the doors? And installing in an unframed threshold? And voiding the warranty? Wow.