Hello ..
I have read project requirement, my name is Shelingholmes and i am Mailchimp specialist, i'm ready to edit header and other elements on your premium mailchimp template, show it consistently and do other editing that you requested.
I could complete this in a few hours related how much editing will be, for consideration, please take a moment to see reviews from other client related Mailchimp, i have also include a portfolio in my profile for additional ..
Thank you :)