30 minutes was an exaggeration it's probably more like 20? lol... The mating surface on the pumpkin is pretty easy but on the housing with all the studs sticking out it's a pain. The scraper tool is too bulky for getting around the studs in my experience, I have to use a razor blade by itself while laying under the car and using a magnetic flashlight to see. My housing also has a bunch of little nicks and burrs around the edges of the mating surface that catch on the blade grrr