Hmm, looking there I found:
PathXmax: 0.00245
PathXmin: 0.00245
PathYmax: 0.002375
PathYmin: 0.002375
PathZmax: a ridiculously long number, 2.***************************x
PathZmin: the same ridiculously long number as the Zmax
This is with the roadrunner tap file loaded.
Are these the correct registers?