Hi Chris,
I have one like that and it is good and easy to wheel around with the roof on it but you need a roof bag as well as any dust will settle not just on the back window but also on part of the roof lining.
I use a hoist to remove the roof, put the roof bag on it and then lower it onto the rack , put another cover over the lot and wheel it to the side of the shed. It enables me to put the hard top on and off on my own and all works well.