Originally Posted by Tauftamir

Perhaps he isn't a Blacksmith and the RNG doesn't drop him a Crown or Warharness?

I don't want this to come across as trolling, but if you want people to use and give useful feedback on your spreadsheet then you aren't going to gain support by telling people they shouldn't touch leather items and refusing to action a reasonable request.

I would strongly advise you let people have a facility to add items themselves if you don't want to be burdened with a request like this.