Adding New Tiles using WEU

I am in the process of adding new tiles in my map, and I had to use WEU for this. However, adding just 1 additional tile increased by map size by 600kb ++. Is there an alternative or more efficient way to do this?

No other features were added, apart from the inclusion of one new custom tile.

After editing it with the WEU enhancer you have to open and save your map in the editor once. Then it will go back to the old size.

You're absolutely right. Thank you for the swift correspondence.