Screw storage stackable box & gridfinty like base

I designed this stackable screw and nut storage boxes with a gridfinty style base. I just printed 3 boxes another 6 are in printing process thats why i showed only 3 in the image.U can print and store 9 box per base and if u want more boxes then just double the print. The lid of the box is dovetale type and maybe slightly tight fit so if its tight fit then just sand a little bit edge of lid then it will fit perfectly.And u want to upgrade this solution then i also uploaded step file for this please imrove this model and share it with me also