Well, after 40+ years, 5 double basses, and more different strings than I can remember, I think I'm done. Bel Cantos on AES#34, and black Eurosonics on the Vertical Bass. #34 is sounding deeper and richer than ever before, both from the player's perspective and out front, and the Eurosonics work great on the VBass for when I plug in. I'll get a backup set of each, and then I'll be set for the duration. Looking forward to a summer of lessons to clean up some bad habits, and hopefully a few more years of making music.