Hey mate, great work! But just a fair warning, 1.2mb for a leaderboard size (728x90) is a huge filesize, and a lot of ad networks won't allow for that size to be uploaded.
Banner-making is a true art form, and to be able to find the balance for great quality of design mixed with a good optimized file size (for fast load times for the end user) is a true skill. Keep practicing, and keep creating these banners, and you'll be getting sales in no time!
Thank you for this information and sorry for my late answer.
In cases where the filesize is too large, I can cut the FPS by half which would result in a smaller file.
Otherwise are the most banners large so I am sure that the most customers know where they can use them and where not.
I will anyway help my customers as good as possible.
Thank you for your kind words.