We’re moving into a 5 level side split home. There are 4 sets of stairs throughout the house. Two of them are an 8 stair closed in staircase, the other 2 are 4 stairs in an open area. The stairs are currently fully carpeted, except for the risers. I want to re-finish the two sets of smaller stairs and install a runner, but keep the 8 stair ones fully carpeted. Same carpet everywhere. Should I be consistent throughout all the stairs, or would this plan work?