Butter-Smooth Lines, Custom Built: The Left-Handed Comanche. Experience the unmatched smoothness of a casternut power liner in this one-off, left-handed Comanche. Built from blued steel and mounted on a unique 90-style brass base, this machine pushes 5 to 14 round liners with effortless precision. This is a custom creation, designed for artists who demand both performance and individuality.