Obviously a decent hood design is not rocket science and there are plenty of examples to copy!
Could do a lot worse than simply copy the MX5. I really dont see why modern soft top cars have to have a mechanised roof. All its adds is weight and failure modes.
I remain convinced that it's not beyond the ability of MMC to create a watertigth hood, rather it's the case that they don't think their carss should have hoods at all and only offer them as a sop to people who insist on be able to drive in the rain without getting wet.
There are two different situations arent there? With the trad still having ridiculous side screens flapping about there is no sure way of ever making a watertight seal. The Aero should be watertight though to be fair to MMC I have yet to own a 100% watertight soft top.