OK - It is working, you just have a different understanding of what they are, hold cursor over edit area for quick help but also re-read the manual . . .
The max_height and min_height are properties when Physics is enabled and refer to the initial resting position of Range boundaries for Physics purposes.
They are not the actual Range variables - they are the x vector , accessed as Range.x and Range.x which is what I think you are looking for
This is the proper operation of these properties and variables, no need to vary this really . .
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