That's why I use 90 lb pull magnets rubberized so I don't scratch up the roof of any of my vehicles when I put them on there yeah those things held on at 100 miles an hour flying down the road.
Well... Had a slight issue with the Respond-A-Laser... IT was pulling WAY too much power for a factory ciggy plug... So I whipped up a quick dash light with my custom made Feniex T-300s... lol