Parametric Tray with Simple Latch Lid

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###Parametric Tray with Simple Latch Lid
##Customizable Tray and Snap-On Lid
##G. A. Tielke, September 2022
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Creates 3d-printable tray, and separate snap-on lid. The size and other settings are parameters that can be set by the user.

This design was initially inspired by:
>Small stuff organizer - screws, nuts, fastener 1.4
>by Zvedak July 14, 2021
>https://www.thingiverse.com/thing:4908289

LID:
Optionally, a Lid can be printed. It will have horizontal bars on the inside to fit into matching indentations on the tray. Note: Even if you do not select a lid, the lid settings will
affect the tray itself.

DIVIDERS:
Dividers can be in two directions:

-Column "C" dividers:
Specifying these will add dividers going in the Y axis direction, creating separate areas to the left & right of the divider. The starting percents are as a percentage of the entire tray length. They each have a length as a percentage of the entire tray width.

-Row "R" dividers