One other thought, because my brain works like that: it occurred to me as I went to cross-link this with another post, that one advantage the MG3 and MIDI Messenger approaches both have, over doing the re-curving on the MIDI host device, is that they are fully portable within the AUM Session that defines them. The MIDI host device of course relieves the plugin host of having to define the curve at all, which results in simpler Sessions, but the portability can be its own advantage in some cases! 
