We have roll out trays in one of our 12" cabinets and we just keep the bread, english muffins, rolls, etc in there. It's really not very big at all, but it works for what we needed it to. I really don't know what else I would store in there except maybe measuring cups, sifters, etc. In your kitchen, I would likely leave the 12" cabinet there but delete the roll out trays and use it for storing cutting boards, baking sheets & cooling racks. It's ideally situated next to the ovens and across from the island for prep. With all that being said--and going back to your previous thread wondering about keeping symmetry on the 2 drawer stacks and the underneath the rangetop--your island hides all of that. I would urge you to really think about how you are going to use that area and make changes accordingly without worrying if everything lines up or is symmetrical. If the island didn't hide that cabinet run, my advice would likely be slightly different, but since the island is there and you can't see behind it from other areas of the house, I would go for function over form. Just my $0.02! Hope it helps!

Dykes Lumber has a huge selection of mouldings and trim in NYC, they have several locations.

We are in the PNW and our architect recommended the Marvin or Western, which has a telescoping door system. We went with the Western door (3 panel) and saved money. We also did a flush threshold. The framers need to make sure to account for this so don’t let them forget it. Despite us telling our GC multiple times, the framers ended up having to go back and create the threshold lower so it would sit flush. Since you are in the PNW, you should account for rain on the threshold. Our door is under a covered porch so rain isn’t an issue.

Painted white