I LA with mostly SoFine #50--no lint, no shine, sinks into the fabric (which means boo-boos not as obvious!), I also like Permacore and will sometimes use Glide if I'm wanting some shine (but I always seem to struggle with a good wind on bobbin with Glide?) and recently used Superior Magnifico, much like Glide but seems a little finer. With SoFine #50 I use a #16 needle, with the others a #18. I hear you on finding the end of the invisible thread--I do use Superior MonoPoly with netting. with both the Magnifico and MonoPoly I do loosen the top tension some. I personally don't like to quilt with all cotton thread--so very linty and it's "thicker" (#18 needle) so more obvious and seems to shred more often. Was glad to see that Superior is starting to make some of their poly threads as varigated.