@brianst – I'm not exactly sure about what you want exactly…
A formula that shows the exact radius for the rounded corner in dependency of the scale factor of the object?
Object is scaled to 70%, radius now after the scaling should be: original radius * 1/0.7 ? (Result: 1.42857142857143) Something like this?
New Radius = Original Radius * 1 / Scale Factor
Uwe