Midi learn in plug-in using Mackie control (eg X Touch)

Has anyone tried using Midi learn in a third party plug-in like one of the FabFilter family, when the midi controller is a Mackie device like the X Touch, and is controlling Cubasis in Mackie mode?

If you have, can you describe which of the options you choose (eg Pro Q3 map to specific versus selected band)?

I would really like to try this, but at the same time would appreciate hearing how someone else blazed the trail.