Now, I used the search bar and searched for "toolbox" and just saw random crap about it and no suggestions based on it so I guess I am safe:
I always felt that toolboxes were useless. They can store tools but when you open them, all the tools come out, making it actually better to not have the toolbox at all.
I put my toolbox in the recycler in shame that the toolbox was wasted in a crafting recipe and wondered how it could have been better and thought:
"In real life, toolboxes can store many tools but when somebody actually uses the tools inside, they don't take them out all at once, they take one out at a time."
So then I thought:
If toolboxes could be portable chests for tools in industrialcraft, then that would be nice.
From my Idea, I would think that you could right click while holding the toolbox and put tools in your hotbar or whatever that is called (the thing where all your tools show up and you can use them) into the toolbox and take tools out and in as necessary. That way, You actually DO save inventory space and works much better than the current toolbox.
Apologies if this idea is stupid or I didn't search hard enough for toolbox suggestions. Feedback is appreciated, even from that certified asshole guy