I wrote this sentence

> Suppose that a user wants to eliminate the navigation links from the page sidebar. She may employ the link density feature in a rule to distinguish this part. (**BUT** ?) When this rule is applied to the page, all such elements will be (are?) removed, regardless of their location in the page, even if they are inside the main content.

I feel if I use **but** I can make a contrast between two succeeding sentences. as something surprising happened. Is it natural?