All the needles
I have yet to find a Black Claw needle configuration that has not met my expectations. But if I were to only have a choice of two, they would be the hella smooth 9 mags and any of the bugpin liners, especially the 7 straight bugpin liners. Also the hella tight 5s and 4s are amazing. Ok, the curved long taper mags are also great. Basically, all the needles. Hope that helps.