LOL Thanks for the tips, guys.
Well, I did one session with Nerida a couple months ago, didn't really want to start as I know I'd never want to stop. But I saw some nice pearls a month ago, and thought maybe I should start ... you just never know when I may have to restring my own. Technically I started only 10 days ago. I have had to redo 2, but only because I was overzealous with the threadzapper and zapped through one of the knots making it a single strand when I ended, and then the one I missed a gemstone. But then I am a perfectionist and I like really tight knots. Trust me, knotting isn't hard. If I can do it, anyone can.
Oh yes, with the powerpro I suspect it thins out when it goes through the gemstone, but unless it actually physically cuts through the knots I don't think it's any less secure than beading wire. I do ream every gemstone I use, usually to find bigger drillhole for the ending pearls so I can double back through them. I really can't bring myself to not knot (pun intended) for something that will go all over the floor if it breaks. I'm actually quite used to the knotted look now.