This is on charcoal. I think it would be fine on gas, maybe lose a little heat, but it's not like charcoal where you're regulating airflow to control temps. I might pull out my gas WGA and see if the interference is the same as the charcoal.
They offered to refund me but I have to pay shipping. I haven't decided what I'm going to do yet, the fact that they will make me "whole" makes me lean towards grinding the edges to fit. But still a little annoyed, my WGA charcoal is about a year old. Maybe weber made some drastic change. But I don't see how these would pass QC testing
Ultimately, if I had known to look for this, it would be less obnoxious to cut them to fit before seasoning them. At this point, I will need to really burn them totally clean so no aluminum chips get stuck anywhere.
LOVE my other rcplanebuyer stuff. But $70 wow. Ultimately, I think I'm going to cut my losses so to speak. Order the PKGo @ $270, and use the grillgrates for searing steaks on the main grill.