Windscreen?

[Doofus]

Can anyone tell me the width of the scuttle on a 4/4 or plus4 / 8 at the base of the screen?

I have a potential use for a Morgan screen, butI need to know how wide it is. I don't have access to one to measure it, so I'm hoping somebody will eventually turn up here and tell me.

I'm trying to avoid the faff of signing up to the Morgan forum just to ask one question and potentially (depending upon the answer) never go there again.