I found that my sweet spot changed when I used a new cord. I was at 6.5 on the same nano with the old cord, now 6.5 is too hot unless I'm vaping oil. A straight 6 is my new sweet spot, so I think the cord is a factor when considering if a nano tends to run "hot". Oh and I have a standard walnut model. Sometimes the wood does feel pretty hot to the touch and other times it doesn't. If you're picking up some glass then you will need a matching gong. I'm assuming the d020 takes an 18mm gong? I like the adjustable gongs. If you do get the d020, you'll be waiting 3-4 weeks for it come from China. In the meanwhile this place sells 15 dollar J hooks with free priority shipping. You just match the J hook size to the gong you pick up. https://dankstop.com/products/grav-labs-14mm-18mm-j-hook-adapter Welcome to the best thread on the FC.