First of all, thank you for a very nice class! 
It was very motivating, and I went out to try the technique on the same day :) 
I do believe it is now supposed to take the two hours I used on it, but I guess that practice makes perfect in the timing aspect. 

Here is the original foto: 

And the final product: 

And the lineart:

All in all, I look forward to trying this more often when I am on the move. Though I do need to invest in a watercolor sketch book, as the watercolor paper block I used, does do too well with transport :)