Thanks for posting this Paul. I use a sanding mop on my puzzles. I've always used it on the drill press. Been thinking g of switching to the lathe for some time. After reading your post I put it on the lathe. For some reason it seems easier to hold the pieces and the lighting is much better.
FDUR blades are 30 cents per dozen cheaper from Hawk than from Wooden Teddy Bear and Mike's site.
http://stores.bushtonhawkstore.com/blades-and-bits/?sort=featured&page=2
https://mikesworkshop.com/collections/blades
http://www.woodenteddybearonline.com/x/home.php?cat=550&sort=orderby&sort_direction=0&page=3
Use them for anything you want. You'll get a good feel for how well they work for you and your application. What I like most about them is how little they want to drift.