Is it possible to create custom connectors?  I would like to create a normal connector (edge) that has the normal arrow heads, but in the middle I would like to place custom shapes.  One example would be to place a mini database shape in the middle of the connector.  If the connector bends n times I still only want the database shape one time directly in the middle of the connector.

The intermediate shape property gives me some of this functionality, however, it puts the specified shape on the connector every time it bends and I would like to have it only once.

Thanks for the help.