xD How did you craft legendary armor without ever using the workstation? Sharpening stone is for weapons, there is a table for armor. If there is no table next to the sharpening stone you are using, try going to Whiterun, there will be a table right outside Warmaiden's when you enter. You can upgrade your armor there.
Congrats on getting daedric! I stupidly used my daedric hearts for potions... haven't come across any more.