Whether installing on a replica or a vintage this will help you keep your spacing even and your grips at 90 degrees from the base. Use this along with the appropriate Guide Lock to install your grips. This is spaced for 7 grips on A New Hope lightsabers.
PLEASE NOTE: This is designed for grips that are approximately 12.75mm wide, such as Blast-Tech and Graflex 2.0 kits. Use Version B for 13.3mm wide grips such as those from Wannawanga.