It’s been a long road for Tennessee’s Straight Line Stitch, from limited releases to changing lineups to grueling tours in dirty clubs. Now tapped to play as part of the Rockstar Energy Drink Mayhem Festival, the band feels like they’re come over a crest in their career. Taking a minute off from promoting their new album “The Fight of Our Lives,” singer Alexis Brown talked with me about music, women in heavy metal, and a copious amount of horror cinema.