There is one small but very useful thing to add (that I found by accident yesterday). When deconstructing (you don't have shards in your 'can be deconstructed' list) you must have items in your inventory - even if they are shards. However, when crafting you can craft straight from your ingredients bag (this only applies to crafting ingredients and collectibles, not Khyber and Siberys shards). Also it might be worth mentioning that shards for upgrading enhancement levels cannot be broken down again. I thought that they looked like a cheap way of levelling but I could not reuse the ingredients (I'll need them later but was a bit of a surprise).
Really great guide - I had almost thrown in the towel on Canith Crafting before you produced it!