[HR9121]

I don't use a blunder but have tried it a few times. It will keep you from redlighting if you get get it set up right. You can make them from pretty much anything. I made a couple out of cardboard and Velcro with the Velcro holding it in place at the top of the strip along the windshield. I think they would work best with a 2-step but as Keith said they can be difficult after dark when the top 2 bulbs will "bleed" around your blinder.