So, I read about this problem and its remedy: Swarm boxes. Here, I've suspended a box with some frames of drawn comb in a tree not far from the platform. It is hung on a strong hook so I can quickly lower it at night if I get 'new renters' moved in from one of my hives. "An ounce of prevention is worth more than a pound of cure"
|Hung on a tree about 12 feel up on a quick disconnect|
|I sprayed the inside with my "Lemongrass lure" - just in case!|