Parametric with for rectangles

Looking for help in plywood furniture modelling.
I need to change with of slots depends of exact plywood width.
Every slot looks like rectangle, randomly oriented on the cplane.
All slots should be changed simultaneously to value from input field.
Any suggestions?

Welcome @gosha7
Need more info / examples

Here is the task.
This slots made for plywood wich have minor thickness tolerance.
I want change slot width according exact plywood sheet. It’s two knid of slots i using: square (at left, marked square) and with rounds at corners for correct cnc machining (marked Round). it’s only flat segment of width must be corrected.
This pic for explanation, usually i use curves, not solids.
Problem is i cannot draw it in GH, so i need to use created curves as input.