Bachus, I used one of these for a while:
https://on-stage.com/products/view/11495/116973Set it up with two arrangers MIDI'd together. Took a lot of finagling to get the angle and the spacing of the two keyboards just right. Even then, the screen and some controls are partially obscured. You can make it ideal for one and difficult for the other, or choose a compromise that makes both workable but neither one perfect. Once you get it set up, forget about moving it unless you have an army of detail-oriented roadies.
A 76-key board (better allows for a 3rd RH voice), combined with MIDI bass pedals or a multi-pedal controller is probably a better solution than this kind of setup.
I ended up ditching this setup and adding a Roland BK-7m to my Tyros. Along with the problems mentioned above, too much of a studio look for my living room! My $.02.