Statement: If you're using USM and TSLRCM 1.8 and just put the models for the lightsabers in, then it's not just you. Since the specialized lightsabers are somehow generated without their specialized crystals (i.e. the Dunas Gem for Kreia's Walking Stick), you can't ever change it, but it's only for the aesthetics of the lightsaber anyway. You're just going to have to get used to not touching the color gem section of USM sabers.