  We expand upon the results of Close et al. 2005 regarding the young, low-mass
object AB Dor C and its role as a calibration point for theoretical tracks. We
present an improved spectral reduction and a new orbital solution with two
additional epochs. Our improved analysis confirms our spectral type of M8 (+/-
1) and mass of 0.090+/-0.003 solar masses for AB Dor C. Comparing the results
for AB Dor C with other young, low-mass objects with dynamical masses we find a
general trend where current evolutionary models tend to over-predict the
temperature (or under-predict the mass) for low mass stars and brown dwarfs.
Given our precision, there is a ~99% chance that the mass of AB Dor C is
underestimated by the DUSTY tracks in the HR diagram.
