ᐅ Ikea Metod Kitchen Wall Rail Issue, Looking for Instructions

In case it's not known, this might be helpful for some:

YouTube.com/playlist?List=PLb3H7jDLpyQpXaqRhIkxaQ1CEuPTR09OI

Thanks for the link, IKEA-Expert.
In the video, it says that the wall rail for a 220cm (7 ft 3 in) cabinet should be installed with the bottom edge at 222cm (7 ft 3 in).
The cabinet including feet is 228cm (7 ft 6 in) tall, so the rail needs to be mounted 6cm (2.4 in) lower at the bottom edge.
At first, I thought of skipping the wall rail for all cabinets, but after watching the videos, I will definitely buy it, even if the cabinets end up standing slightly away from the wall.

After watching all the videos several times, I still have a few questions.

1. When mounting on the wall rail, do I only need two legs per cabinet to support it at the front, or should I also place two legs at the back because of the cabinet’s weight (for example, a tall cabinet with an integrated refrigerator)?

2. How does the installation of a side panel work when using the wall rail? Does it align flush with the cabinet body and mounted front at the front?
When mounting the cabinets with the wall rail, they stand slightly away from the wall.
A tall cabinet body has a depth of 61.6cm (24.3 inches), and the side panel has a width of 62cm (24.4 inches).
But are the 0.4cm (0.16 inches) enough for a flush finish?
You can see the side panel installation here (at 2:10) [YouTube:xqoxzeru]https://WWW.YouTube.com/watch?v=BeRXze_jcp8&Index=3&List=PLb3H7jDLpyQpXaqRhIkxaQ1CEuPTR09OI[/YouTube:xqoxzeru].

1. It doesn’t hurt to use 4 feet.

2. Cabinet body 59 cm (23 inches) Rail 1 cm (0.4 inches) Front 1.6 to 1.8 cm (0.6 to 0.7 inches) - 1 mm (0.04 inches) gap = total depth 61.7 to 61.9 cm (24.3 to 24.4 inches)

And once again, thanks, IKEA expert!
Do you work at IKEA, or why do you know so much about it?

I have nothing to do with IKEA. You probably just have to be a little bit crazy.