Was looking for a good stand for my Amazon MYNT3D Printing Pen that left the nozzle open if it was still hot. It should put the nozzle about 8mm or so off the surface and only the bigger of the 3 vents on the sizes of the nozzle is covered. PLA should be fine.
I added a second version at a 45 degree angle if straight up and down doesnt work in your situation.
I used PLA, but obviously PETG/ABS would be better.
Supports:
Yes for the center square.