Dan, your discs are beyond beautiful. Care to go through your production process/tools?
Would especially like to hear how you do the "swirly" stuff.
I have just started out. I am using liquid Rit, painting it on, and I have a hard time making the colours really pop - like yours certainly seem to do. (Will post my own - few and mediocre as they are - dyes when I get back from the Danish Championships this weekend.)