Oh, cool; that's a much better position than I thought you might be in. Will it be possible to have different objects shown and hidden in each viewpanel, or will that be synchronized between viewpanels? Also, will it be possible to have different snap values between viewpanels?

UI-wise, it seems like it wouldn't be too horrible to leave the full-width bar on the bottom; you'd lose the File-Delete buttons, plus Options and Help, and then the file name display and the three line box status box up top would move down into the bar. If you do have separate show/hide state per viewpanel, then you probably would need more of a flyout, as you'd have to fit a separate copy of the scene browser in as well.

/Ella