Print with 35% Gyroid infill, 4 perimeters, and turn off top and bottom infill layers. You can also just use the provided 3MF project with the settings already applied. 

In addition, you'll need a 3mm rod or wire of some kind, of about 85-100mm. I've found that the 90mm range offers the bed performance. Due to shrinkage, the rod will require a bit of gentle encouraging to get in the holes, but that keep it in place. 

Note: this may or may not work with the Broadcaster, unfortunately I don't have one to test it with