What is the design preference/practice for shelf depth in base (bottom) cabinets? I seem to remember the middle (only) shelf not taking up the entire space (front to rear), allowing one to put say, a really tall blender on the bottom (floor) of the cabinet. And what is the reason for that practice? Sorry if dumb question, never done cabinets before, and my existing ones....aren't a good example to go by. Or let me be blunt: with the "off cuts" left over from cutting all my carcass parts, I can put in shelves in the base cabinets that don't fill front-rear, rather, they're 12-ish inches deep. Otherwise it's another day-long trip to find more plywood. These are for own use, but at some point I'll sell the house. No plans to do roll-outs or anything other than basic base cabinets. I didn't plan the cut lists that way, I'm just looking at this pile of off cuts and easily have all my shelf needs filled if it doesn't violate some "aesthetic" rule.