I had to redesign my 100 pcs hex bit holder for a number of reasons.

1. It was very hard to pull out any bits located in the middle.
2. The dimensions were different from filament to filament.
3. I had to add an handle, to be able to pull a tray out, if it located in the stacker.

What did i change?

1. obviously i changed the amount of hex bits from 100 to 66 (8 x 8)
2. I made the design thinner, using less filament.
3. I made the hole for the hex bits just a little bigger, which should make it much easier to insert and pull out hex bits.

If you run into dimension issues, scale the design on the X and Y axis.