I have the same arrangement as Kibo on B41-2003. But it never stops to amaze me that there are limber holes only in the area of the keel bolts, there must be 10 zones which do not drain, all of them being potential swimming pools. Those under head modules nearly impossible to pump out. In other words any leaks, other than around keel bolts, would have to overflow floor before water gets to bilge pump. Not a clever design.