Solar Panel Sun Finder

My family and I do a lot of camping. I have a small backpack sized solar panel to keep small batteries topped off when hiking, but recently got a larger panel for car camping. I stumbled on aiming devices for solar panels on Amazon. They aren't very expensive, but $10 seems like a lot for what they are. I decided to model and print my own design that doesn't need any clear plastic parts.

Set this on the face of your panel and adjust the panel until the shadow in the center is gone.

This shouldn't require any supports. I designed it so you can get contrasting colors with filament changes if you have a single nozzle printer like I do.