I work for an MEP firm that uses 100% REVIT. We get clients that provide AutoCAD background and we'll linked them into CAD. We can create spaces via space separation lines. ElumTools still allows you to perform calculations without having the actual geometry (Ceilings, Walls, Floors). It would be very useful if ElumTools can use the boundaries of the space in REVIT to simulate Ceilings, Walls & Floors and specify the reflectances as you would with AGI32.