New and Used Hagstrom Ultralux XL-2 Guitars for Sale The UltraLux Series XL-2 is a soloist’s dream, featuring a new state-of-the-art neck design that is so thin it has to be played to be believed. Measuring a mere 18-19mm thick, the UltraLux’s neck still benefits from Hagstrom’s H-Expander truss rod and Resinator fretboard for stability