Thanks for the update, ajb2k3. Good to know a full overhaul is in the works, that should deal with navigation and finding the right topics. Looking forward to seeing how it improves the forum experience.
@felmue Finally got it working correctly. In addition to your code, I initialised the Pahub, and then changed the dip switch to 0x71. Additional units work fine when assigned to 0x71.
Thanks for the help!