Hi all,
I've got a 1980 4/4 with a fixed windscreen and mounting brackets for aeroscreens fitted (aeroscreens in a pouch came with the car). I suspect in the midsts of time that the correct folding screen probably went walkies, and I now fancy trying out the aeroscreens so this may be a really simple question, but is it much of a job to take the windscreen off?
It looks like there are three or so about 10mm bolts through the base of the frame into the scuttle each side. Do I just undo those?

What I have learned about my Morgan so far is that Morgan don't really do captive nuts anywhere else on the car, so while these bolts look obvious I hoped someone could clarify if they are captive on the back? If not they look a bit of a pig to get at, so any tips a) for getting at them, b) confirming it is those bolts I need to undo and c) absolute 'don't do that' warnings to prevent me shattering the screen through bad technique or general clumsiness. Peoples views about removing the wiper blades while the screen is off are also welcomed.

Thanks!