robert_e_bone
I am a keyboard player, who ended up ambidextrous, as I started life left handed.

I have my 2 keyboard controllers on my left, and my computer display on the right, along with my mouse.

For many things, I keep the computer keyboard on my lap.  For tricky parts, I will kick things off with the mouse on my right, and sit up and play 2-handed on the keyboards.

My only real issue is that anytime I have the headphones, the cat keeps biting at the curly cord, and it pulls the headphones off my head in the middle of takes.

I think a bigger MOUSE might give the cat pause.......

Bob Bone

Classic!!! 
I wish I could help out with the OP's real question, but I don't do keys to the level that many of you guys do. I don't really (just because my MIDI parts are simple) need my hands on all three devices at any one point. I generally start the transport either on the MIDI controller or on the PC's keyboard with enough count-in time to spin the chair to the keyboard. Now, I'm wondering if I need to be doing more..

Paul P
I've discovered that I don't have enough right hands to use X2 efficiently.  I need one for my mouse, one for the pc keyboard and one for my midi keyboard.  Since I seem to need to keep my right hand on my mouse a lot of the time I end up playing the keyboard with my left hand crossed over my right and I get all tangled up...

Traditional music studios needed two or more people to operate them.  Current home studios need one person with extra arms.

You can also get a basic controller that is programmable and provides access to most used functions, such as the AlphaTrack (although, I'm not sure if this work with X2... haven't tested it) or the Contour ShuttlePRO (has programmable buttons and jog wheel, works nicely).
 
Scott

--
Scott R. Garrigus - http://garrigus.com - SONAR X2 Power! - http://garrigus.com/?SonarX2Power
* Author of the Cakewalk Sonar and Sony Sound Forge Power book series: http://garrigus.com/?PowerBooks
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