I have one small change for you and then I can accept the paper. Referee 2 made the comment: "I think the VBS approach needs more than 4-7 species to be transported in 3-D air quality models. The number of advected species in 3D models depends on the implementation of the VBS approach, nevertheless at least 10-20 species are needed to be transported for implementation of the VBS approach in air quality models."
Your response does not include a change in the text to provide clearer context for other reasonable readers, and the Koo reference, in some ways, seems to support the Referee. Do you mean 4-7 transportable species per parent reactive hydrocarbon? Table 1 in Koo et al, (2014) seems to have 5 species for HOA and BBOA, but 10 for SV_OOA. Would you provide clarifying text (a word or 2?) to the mansucript at Line 51, page 3 so that it is more explicitly clear what you mean? Thank you.

Thank you for your revisions!