Playing with this chapter, i had a problem about scaling loop faces, that caused asymmetric and weird transformations.
After a bit of tests by myself, comparing the settings of the Header Info between the video and mine, i found that i had a settings different from the video and it was the Pivot Point. I had mine set on “3D Cursor” while the video had the “Median Point” enabled. I Think that this is something that in the video has not been stated anywhere but it should: the importance of pivot point in transformations
thanks