Since I do a lot of original work in my home studio I found that by sending all the outputs to my mixer I can tweak the volume levels to balance all 3 keyboards to play through the studio monitors pretty easy, but no matter how you slice it I am still constantly fiddling with the onboard mixers too. My new Korg PA500 is a great comapanion board to my Yamaha, and my Roland. Now I just need to crack the manual to learn how to customize my own styles I'll be in great shape.