Honeycomb tool organizer optimized

I've seen a really cool organizer design, but I think it could be better.

I made my own version with a 1.6mm wall thickness for printing 4 perimeters with a 0.4 nozzle. It's more than stiff enough and has a slightly better material consumption.

I also added extra slots on the back. They're not very big, but they're useful and don't waste valuable space.

And finally I made two bigger versions with 4(208mm wide) and 5(260mm wide) back rows.

Also I'm thinking to make a version with one more row of small slots but little lower(25-30mm may be). 

I printed only small version for me now but when I'll decide need I lower small slots or not I'm planning to print biggest version.