In Argentina last spring there was some talk about making it easy to set up transformation coefficients in VPhot, perhaps by some sort of standardized processing of, say, M67. Has there been anything happening along these lines?
No, I'm afraid we have not come around to that yet, and I'm not sure when/if. This is a project that Arne will have a major role in, it is he who has the knowledge.
Just to summarize for the records, one can apply transformation coefficients in VPhot, but there is no tool to help determine them yet.