You should. You can always update the article with each change and the reason why it was changed. I LOVE coop article like that. It's so helpful to know why decisions were made and what altered them.
Since you get hot summers you want PLENTY of extra airflow. Heat and ammonia both rise so venting them at the top of the walls just under the roof is the best option. You could also leave triangles at the top of the side was open with only hardware cloth on them (which makes putting in your siding easier too).
There is essentially no such thing as too much ventilation unless it's so open that the birds can't get out of winter storm winds.
Don't hesitate to change your design to match the standard size of materials. Anything other than dimensions divisible by 4 requires extra cuts and wastes wood. 6x6 is better than 6x5 because you can cut 12-foot boards in half.