Hi ww,
I couldn't help laughting either it was like something out of one foot in the grave- but I did feel giulty because I wouldn't have liked it and my missus would have hit the roof. When I started she only let me advertise my mobile number. She thought other wc would phone up and threaten me.
My roof rack(with a roller) was £200 from a firm in Nuneaton Roofrack.co.uk I think. I don't know if they do the rollers seperately