Is my Yasuo attack speed math correct?

Im trying to make a rune page where I would have max CDR on Q with just static shiv as my AS item at level 18.

From the wiki, I gain I gain 0.58 CDR from 1 AS, capping at 66 CDR for Q. That would mean I need about 113.8% bonus AS. If I gain 3.2% AS per level, I would need about 59.4% AS left. I'll pretty much always have stattik shiv, so that would mean I need just 19.4 AS left. With 8 AS runes, and 1 AS seal, and 5% attack speed from masteries, that adds another 19.36, which is close enough to capping my AS CDR, so I'm planning to go with that for my runes.

Is my math correct? Is there any misinformation that I may have gathered? I'm currently unable to go on league at this minute so I can't check if any of the information is outdated at the moment.