Customizable wire rack clip

This is the first (of hopefully many) designs I'm working on for those wire racks everyhere.
Considering in our office alone we have 4 or 5 different brands and sizes of them, i wasn't able to find a good amount of stuff here so i'll be making them all customizers.

This print doesn't actually do anything, but you can use it as a base for making different clip on attachments (that's what i plan to do)

I'll be adding more settings to this soon.

EDIT1: added some more information about what the variables do.
EDIT2: moved the flex notch to the bottom because attachments were reducing its effectiveness and it was breaking the clip.