Single to double vanity - DWV verification

[Keith613]

Hi everyone. I'm in the process of converting a single bathroom sink to double vanity. It's all 1.5". I tried to use some suggested pictures here as a guideline, but I've attached my current dry fit if you would be so kind to have a look - comments would be most appreciated. The vent is dry and going up through the attic above.
Thanks very much
Keith

 

[Terry]

The horizontal revent should be six inches above the flood level of the fixtures served which is normally 42".
I normally use 2" for two lavs, Canada may be different.