Dear Danny,

I read your nice paper with enthusiasm and as you said it looks completely submittable. I have only two suggestions:

In Sect. 4.5, it is discussed that the dust mass determined from a single T modified black body is lower than that from the Draine & Li (2007) formalism as the single T modified black body does not account for the contribution of warm dust emitting at shorter wavelengths. An emergent question here is that what about the mass estimate  based on the two-component model given in Equation (8)? and how it is compared  with Draine & Li (2007) model?

*** I find that the two-component blackbody fits yield ~32% larger dust masses, on average.  I ultimately decided to leave the detailed analysis of comparing dust masses from different types of fits to Gordon et al. 2012 and Galametz et al. 2012.


On the same topic, I think it is interesting that starting from a variable beta has led to a most probable value of beta~1.5 (Fig. 10) which worths mentioning it. This is also in agreement with e.g. Kramer et al. (2010)'s finding for M33.

*** Interesting!

..and one typo:

References, p. 18: I think 'Li' should be 'Lee' ->  Draine, B.T. & Lee,
H.M. 1984, ApJ, 285, 89

*** Fixed