Hey, thanks for working on this - it's amazing!

Would it be possible to support half size grid cells (21mm x 21 mm) while generating bins? Being able to create bins with dimensions like 3.5 x 3.5 would make it much easier to fit things into a drawer and reduce wasted space. It would also be useful to support half size bottom grids on full size bins - for example a 4 × 4 bin with a 8x8 half-size bottom grid would give a lot more flexibility when positioning bins.

Thanks!