AG, correct, the HQ wagon rears are nice and smooth, the J-Z ones have an indent for a rubber strip....

Mook, i have a sweet as rear bar at my folks, i'd need to confirm if its a non rubber one though. apparently the bars are about 3/4 inch too wide to fit nicely on a van, i mean its nothing much (like 1cm each side) but if you want uniform gaps then getting someone to chop a little out of the centre will make it line up pro.

unfortunatly i cant help you with the front, I've just used my old one as exchange for a new one.