I wanted to add gridfinity to my Packout drawers, but the normal base grids wouldn't be as effective as the bottom of the drawer isn't flat, using the gridfinity add-in for Fusion 360 I made a 7x9 grid, made the sides wider to account for the empty space, and made a way for the grid to be locked in and supported. I split the model into 4 and glued it together.

To be paired with 3 Drawer Packout Gridfinity Boxes - Full Drawer

https://makerworld.com/en/models/448609#profileId-355421