12/12 pitch roof on 2 story house. I hate going up on it. Ridge vent was installed (by others - can’t get them back) too close to gable end chimney. During heavy rains, it leaks. I want to remove a small section of this Cobra II vent, about two feet. Original ridge vent was aluminum, same location but it did not leak. Seems it would be a strait forward repair. Any suggestions on the repair process, and with what material to cover the slot? I’ll try to post a picture later. Thanks in advance.