Okay, of the 4 items I got this one was the trickiest one to install.
FIrst, you will need some strength to unscrew the original screw on the frame.
Once you take it out. The instructions were not 100% clear about where to put the washer. But with the photos, you can understand it well.
The most difficult part was to keep the shape of the slider as the instructions and photos above says.
Every time you screw the whole plastic piece moves so you have to find the way to finish with the last turn in the position that you like. Or the standard position that R&G says. Horizontal and with the shape of the tear looking backward.
Still easy to install but you will need to buy a Torque Wrench. They are a bit expensive so don't panic. The total time to install this piece should be 15-20 min
AGAIN Super FAST delivery and 10/10 customer service. Aimee is the best.