Weber Kettle setup for Rotiserrie/Trays

Okay guys need a bit of guidance.

Not sure if any of you guys on here not only own a Rotiserrie for your Weber Kettles, but if so, have you bought the Onlyfire Trays? These attach to the spit, and look to be an amazing way of making ribs, veggies, fish, pizza, etc! We bought these on Amazon, and wondering how you have your charcoal setup. Of course I have every option in the baskets, slow n sear, as well as Vortex.