Stackable Modular Parts Drawers

This is derived from Brooks Talley's [Stackable Modular Parts Drawers](https://cad.onshape.com/documents/2884a7172eeb0966f7e8733e/w/81816c3be717f97506abc74b/e/9902900f65ecc45d861c2203?renderMode=0&uiState=64924c0710a74e0031d71447) design I found on OnShape.com. I have no idea how he did all that he did on that platform, but am dangerous enough to have figured out how to manipulate the variables (mostly to reduce material consumption - the walls were way overkill for my purposes) and customize some drawers. My copy, including those modifications can be found [here](https://cad.onshape.com/documents/f802d270a0f43ad6c6e849cb/w/c28bb8fa2c2421f862a765e0/e/4119551913ab637f0f639dab?configuration=List_Sb8j6DyVjxJB3N%3DDefault&renderMode=0&uiState=649249b73257b46f62531f4b).

What I'm uploading:
* MedDrawerHolder - the shell with slots for 4 drawers
* MedDrawer1-StdDiv - The top drawer is Brooks Talley's default compartments. Good for screws and tiny parts.
* MedDrawer2-NoDiv - The second