About this 3D model

I had to redesign my 100 pcs hex bit holder for a number of reasons. It was very hard to pull out any bits located in the middle. The dimensions were different from filament to filament. I had to add an handle, to be able to pull a tray out, if it is located in the stacker. What did i change? obviously i changed the amount of hex bits from 100 to 66 (8 x 8) I made the design thinner, using less filament. I made the hole for the hex bits just a little bit 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.