ataxian
PALE BLUE DOT
I agree on the D020 for oil rig!Doesn't the D020-D have flame polished slits?
I don't own a D but I do own both the original D020 and a 187 which is very similar to the D. I would recommend the D model over the original D020 to anyone who wants a good vape piece.
But if you are planning on using it for oil then maybe original D020 is better since it is smaller with less diffusion than the D. There are much better oil rigs available though
It is way better than my smaller bubblers for concentrated. For the SOLO I find the D020 perfect!