Top: relative velocity of the binary components in RA and Dec between the positions from Reipurth et al. (2007, R07) reported in Table 1 and those measured in this study (our measured positions minus R07 positions). Bottom: relative velocity between Keck and Gemini measurements (Keck-Gemini), as well as between Keck and R07 measurements (Keck, R07) for JW 176, 391, and 709. The small relative motions between Keck and Gemini epochs are consistent with bound systems within the errors.