A first-modality gateway and a second-modality gateway are synchronized, with both gateways interfacing between a user and a server system. After an operator chooses an initial cutting height the automatic systems maintain that height even as ground conditions change. For example, subscriber portability data contained in a large national local number portability database is divided or segmented according to NPA-NXX ranges or geographic regions, and LNP data associated with each region or segment is stored on a different database service module within the message processing system. Also disclosed are non-human transgenic vertebrates produced in accordance with the method, including transgenic progeny. The first processor updates the first data structure based on the received representation of the second data structure.