We are having a deck installed....almost time to start laying top boards. The plan is to go under the railing approximately 1 inch, but where the caps are they go down more than the railing, leaving only about a 1/4 inch gap. Is that adequate? Will replacing the liner be hard? I'm just wondering if I should see if the installer can cut notches for the end caps or else have the wood go only to (not under the railing? Opinions Please!!!!!!