Neutron interferometry at the National Institute of Standards and Technology is a well-established program that performs experiments in here a wide range of areas including materials science, quantum information, precision measurements of coherent and incoherent scattering lengths, and dark energy/fifth force searches.Central to the continued success of this program is the further understanding and elimination of instabilities and coherence-losses whether they are from thermal, vibrational, or natio celebrate eyeshadow palette dynamical sources.We have spent considerable effort in fabricating new interferometer crystals which have higher maximum fringe visibilities and that can be tailored to specific experiments.We describe the current facilities and a new post-machining fabrication process of crystal annealing.