[mura_gadi (Steve)]

Had the same doubts, was going to call someone this week in the trade to ask them. I'm hoping if the drum is under the track height I'll still get the mass for the drum to operate and maybe a 10% incline on the roof to help?

Ok, A little more thinking and I'm thinking for weight and convenience a window security screen might be better. Seems they can do custom jobs up to sun room size for NSW.