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I am wanting a popup roof for my astro like I see in youtube vids can it be done or are they only vehicle specific? I really want to be able to stand up in my astro van..

Selling Our Banshee Off-Road Camper. PRICE DROP... 01/20/19 Kathy says it has got to go (since we have purchased the new camper). I have $7,500 invested in this. Will entertain $6,300. It has been winterized to protect the plumbing. We are changing our style of camping and need to sell...