Plain Effector driving other object properties

Hello all, I've been stumped on a project today and can't seem to find any proper answer online myself.

I've got a simple grid cloner setup, with an Extrude NURBS and a rectangle spline inside of it. When I pass the plain effector through my grid it is currently shrinking the size of tile chips it passes over (The plain has a box falloff also).

What I would like to do is drive the radius of the spline inside of the extrude nurbs from the scaling of the clones. I figured this would be a simple xpresso task, as I have done similar with a sound effector.

This hasn't really worked for me. I tried connecting the uniform scale property of the Plain effector to a range mapper and then to the radius property of the spline but no luck.

Should I be looking at the modified property of the effector or should I be driving off of position? Perhaps I'm totally off on both accounts.

Anyhow, thanks in advance for any future help.

Hey! Thanks for the reply and the knowledge. That's an interesting answer with the blend mode. The only problem is that you don't get consistent results across the entire grid. There is still a gradation at work with the shapes. This did give me a few other ideas to tinker with though.

I also understood what you were talking about, that if I drove the radius that it would apply this across the entire cloner... but what I'm confused on still is what property of the clone should I be thinking about to drive another property. When I'm using a sample node, what port should I be looking at to connect to a range mapper?