Gidday Mark
As per my sig, I have a '10 O/B Hawk. It's stored in the carport, which is also has around 2.5m clear height to work with.
I can wind up about half way, but that is with a roofrack. This is high enough to slide the bed ends out (but not prop them open) and go inside to pack things no dramas.
Also means I can dry out canvas if it is packed away wet - only half way up means I just hang out the canvas side over the side of the camper.
The open height on mine is near enough to 3m (2.9m excluding the roof rack)
Nutto