I'm looking to make reference planes for some symmetrical designs and I want to know if there's any way to create reference planes using equations. Right now I'm trying to set and an offset plane distance based on a value given by the equations of the overall part, any thoughts? Thank you.

For example: The equation I have gives a distance away from the origin, so I'd like to have a plane created parallel but offset by that amount. So that I can change the value on the fly for different set ups but the plane will move with the changes as well as all the mirrored features.

Thank you!