Gregtech tools in Project/Auto workbenches are now consumed since 63fc6e9.
Items crafted using GT tools before the update worked fine and crafting used up tool durability as expected.

Here is a demonstration of the issue

c9467d4 works, if anyone is having the same issue.

GT must be using NBT data to keep track of damage. Your patch might fix this issue but it causes this same behavior on all other tools such as saws.

I'll try and find another solution...

Your patch might fix this issue but it causes this same behavior on all other tools such as saws.

@MrTJP
All tools I tested with my patch including saws added by projectred appear to take damage.
Is there anything more to it?

Im guessing its the way gregtech handles damaged items. Right now, it works for all things including bucket recipes, wrenches, etc.

Maybe GT items are storing damage stats in NBT instead of the item damage parameter. Or the item classes might not properly be reporting themselves as container items.

@MrTJP, I see you were unable to find a resolution for this issue. Is there any information you could be provided that might help isolate a working solution?

GregTech is a rather large and popular mod, and your Project Bench (typically) provides ideal logistical approaches to solving its in-game problems.

To add... GT is indeed storing its damage as NBT. Classic damage value (META) is used in GT to specify different metaitems (as they are called in GT) Every crafting takes different chunk of the damage depending on what is crafted

I just haven't had the chance to look into this as much as I would've liked. I'm very busy at the moment...