Option to fit q and Mtot rather than M1, M2?

[tofflemire]

Hi there,

Is there any broader value to creating an option to fit the total mass (Mtot) and the mass ratio (q) rather than the individual masses?

For context, I am fitting an orbit for a young binary that has poorly constrained individual stellar masses (due to the fact that it is young -- large model uncertainties), but it's components are near equal brightness and therefore a tight prior can be placed on the mass ratio. The data I am fitting are relative astrometry (23 epochs) and relative RVs (2 epochs).

Do any internal folks have the interest/bandwidth to take this on?

Thanks,
Ben Tofflemire