Bachus,

I am glad to hear you like KeyStage. It's amazing what you can do with a $20 app. I have been running both Camelot Pro and KeyStage. Pros and cons as usual. I like how you can so much with both without going through a 3rd bridge app like Audiobus3. For now I like Auv3 (supported by Camelot Pro) more than IAA (supported by KeyStage). IAA a built-in feature of IOS is obviously more convenient than a 3rd party bridge app like Audiobus 3. There's so much going on so fast in the IOS world like you said about AUM. There is AudioShare and scores of other tools. Speaking of MIDIflow, that eliminated a number of hardware devices for me. It can do some complex midi acrobatic work so easily just because it is software.

For those who want to know more about these key IOS tools such as AudioBus3, IAA, and AUv3,
https://futuresonic.io/blog/audiobus-iaa-and-auv3-whats-the-difference/

Forgot to ask you; you said, "did you know you can import cubase .ins files.." I don't use Cubase, but by .ins files, you mean instrument definition files started by Cakewalk?