Hello – I have a Paragon Janus kiln that is capable of firing either glass or pottery. Quite by accident (I hit the pottery switch by mistake), I found that I have more flexibility and 20% lower firing costs if I set the kiln on the pottery setting. I can get consistently good fused results on multiple shelves when it’s on pottery mode. I can drape/slump on the pottery setting with good results, but have to keep it to a single shelf with lots of space around it. At this point, I reserve the glass mode for large draped pieces. Hope this helps!