I have been away from the forum for some time, busy with life as they say. But I am still throwing and making spintops/strings almost every week.
I really enjoyed reading your lathe journey and figuring out making spintops. Tons of fun for sure!
I have been making them quite a bit over the past couple of years, and I did make a video about making a professional level spintop out of delrin. Check it out here: (I have a quite a few videos on making spintops, check out the spintop playlist for more videos.)
I also make my own strings. (K'nex string maker method.) I have found you need to use 12-16 strands for a 4" top.
I make and sell the strings, if you care to check that out, I sell from my website.
http://www.dazzlingdave.com/store/spintopstring.htmlHave fun!
Dave