The ony time you need a roof in the rain is when you actually have to stop for some reason!
I have used my roof quite a bit over the years,
lots of Nationals and long distance trips,
its only been the last year or two we Qlders have managed to dodge the rain on the way down..
I have also put it on for scorching hot days to avoid the Qld sun...
Tenax Fasteners are the go,strong and neat,
I used a fibreglass mould around the rear body to attach the roof to the car,
attached by tenax to the body and press studs to hold the roof to the moulding..
also the 1 piece DRb header rail to give some extra height and shape at the windscreen,
held at the ends with overcentre latches..
Never bothered with side windows etc,
just a drip gutter trimmed over the window openings
I used a double thickness Mercedes cloth I think,
the Heavier the better,
A light vinyl or cloth will flap more than a Quality purpose made heavy cloth.
Don at Snakebite also has all things softtop and good advice...
Annvid did my trim side of things..
Cameron, Heidelberg , AIR Conditioning,doesnt that cost horsepower?