This upgrade kit will take your 12 unit Deluxe or Super-Deluxe and make it an 18 unit. Keeps your footprint small without adding another gourd rack. Be sure to choose the style of gourd arms that match your original gourd rack, that being aluminum or stainless.
This modification will need to be done before or after the Martins leave as you will need to remove the pole from the ground stake. As an added tip, there is no better time to oil those pulleys. Use a quality oil like 3 in1 oil. Using WD-40 won't last as it is really a water dispersion and not an oil. Be sure to catch both sides of all the pulley sheaves.