Well, until a few days ago I was completely unaware of the feature that you could use [ set] and [ pc] tags for including piece images in an article. But I think that someone that was able to put these things in his article in the first place should have no problem in changing those later. The Diagram Designer is not very user-friendly, and to get the HTML code that you have to paste into your article to include the generated diagram you have to type the piece labels in a FEN. So he should know that the piece labels of the unorthodox pieces originally were .ef and .ngu, and that he could get the labels in the PNG set (and the name of that set, that he initially had put in a [ set] tag) in the same way as he got the original ones.
So I don't think there would be any difficulty here; it required redoing what he had already done. While I, on the other hand, first had to figure out what he did in the first place.
Well, until a few days ago I was completely unaware of the feature that you could use [ set] and [ pc] tags for including piece images in an article. But I think that someone that was able to put these things in his article in the first place should have no problem in changing those later. The Diagram Designer is not very user-friendly, and to get the HTML code that you have to paste into your article to include the generated diagram you have to type the piece labels in a FEN. So he should know that the piece labels of the unorthodox pieces originally were .ef and .ngu, and that he could get the labels in the PNG set (and the name of that set, that he initially had put in a [ set] tag) in the same way as he got the original ones.
So I don't think there would be any difficulty here; it required redoing what he had already done. While I, on the other hand, first had to figure out what he did in the first place.