I just underwent some failures when crafting my GS accessory due to the unclearness of the description of the GS crafting planner and the imperfectness of GS crafting mechanism. Now things have to be restarted from scratch. I don't know how to describe my frustration and unhappiness.
The main problem is that the two supreme shards have to be combined together before being combined with the GS accessory. If one of the supreme shard being combined with the GS accessory first, then the crafting device won't let you combine another supreme shard with the GS accessory. This really sucks.
This problem ought to be solvable if we have GS Deconstruction, but unfortunately we don't have GS Deconstruction.
We need Green Steel Deconstruction asap. Seriously.