Man thats a lot of sink...
As too the stepped drawer, I built one. Seemed obvious to utilize space, however its proved problematic, though ours is shorter the last half or back end. In your case being side shorter simple dowel might alleviate?
That said, depth of drawers. Are there other shallower drawers, for kitchen stuff etc? Deep is nice for storage but for item retrieval shallow easier. I understand the material reuse, but seems top drawer would be more usable as 2. Appreciate the T slides but they do use up space.
Know 1st response answer if I suggested smaller sinks to Margaret but I 'think' she'd rather have work/counter space and easy to use drawers. Just an observation.
