...but the problem is that we need to connect the drain to the wall, not the floor. Because:
a) That's where the plumbing is, and b) We need to store stuff under the sink
What are our options? Is it possible to find a 3" diameter drain basket assembly? Is it possible to bore out the hole to 3.5" without destroying the sink? (It's cast iron with a fine porcelain coating, so it seems unlikely/very difficult). Do we just need to find another sink?