• 20mm TIR lens of your choice dropped into an S2+ in place of the reflector. Beautiful blending of the beam, especially the 4C (beautiful warm-sunlight color) and no fried-egginess of the beam at all anymore.

• Fasttech deep-carry clip (advertised for the S2/S2+) which fits the Nitefox UT20 and similar lights as if it were specially made for them, even down to the color/matte of the finish.