Page 7 in the written instructions of the Gusset Part row #44 has a LLI too many. It should read: (p, ktb) 9x, k9, RLI, k21 (19), (ktb, p) 9x
The charted instructions on page 8 are correct.
Row 44 on page 8, is falsely called 42.
The said spaces in the rows 1and 15 of the heelflap on page 9 are to be removed.
The Venetian Blinds socks are knitted toe-up. Of course you can also knit this sock top down. It doesn’t matter,
from which direction you approach the Venetian Blinds effect. In case this is your first attempt to knit socks from the toe up, this pattern will guide you through all the steps. But you can just as well ignore these instructions and concentrate on your favorite way to knit socks. (This does only apply to the photos by Ursa Major Knits. The heel you can see on any other pictures might be different from what you get in the pattern.)
You will find a section of photo tutorials at the end of the pattern that might come in handy for future reference.
You will need two balls of solid yarn, 1,76 oz/50gr each. The effect is the strongest is you choose two yarns with a high contrast in color value. But you can just as well achieve a nice understatement effect, when you go for yarns that are very close to each other. It all depends on the outcome you want to create. Even semi solids would work.