2x4 stackable brick drawer

Finally got around designing proper brick drawers accurate in proportions and with a satisfying clutch power Has large opening to fit finger, studs are accurately spaced and allow smaller brick to stack in the middle. Entirely redesigned in Onshape in 1:1 scale but intended for being printed at 500% Other files available are the 1x1 brick , 2x1 brick and the 2x2 brick