Still learning my 14mm QC and waiting on a bigger torch for the 18mm. I was amazed at the flavor when I got it right. I'd like to see undimpled stems as an option though — I'll get enough cooling from another glass piece
I got this one from OGB for $62. It's slightly customized to be planar and S-shaped rather than offset and N-shaped. Very happy with it and all his work.
I think the whole "don't put caps in ISO" is to make sure people don't heat them when there might still be ISO between the discs. Once you're sure it's dry it should be fine