Long, low, framed storage ledge

[meanwhile]

We're working on a build with a long, low, framed ledge beneath a couple of windows with some kind of integrated storage – currently trying to figure out how the storage will work. We opted to just frame it instead of doing full cabinetry to save money. We might just put drywall on top and figure out some kind of drawer fronts for each section of the framing.

 

I'd love to model this out in Home Designer. The Cabinet tools seem to get me somewhat close, but it seems like I might be using the wrong tool for the job. Would anyone be able to guide me on this? Getting it to wrap around the very small divider wall on the far right is especially tricky.

 

Thanks!