Thanks for the positive replies.
Rusty, I did a fair bit of searching for home made screen stuff but managed to miss that. There was a thread on the XRV forum about a bloke who made some brackets, his are much more professional. Quite right nothing from the wardrobe though, but if I needed to make it up and downable I'd spotted the drawer runners...
As for the shape of the screen, it was initially flat along the lower edge but didn't have much of a gap, so I cut the shape we have here. I'd love to say I did a significant amount of in depth wind tunnel testing, sadly this ain't Bigpie Industries with with millions in an R&D budget. I'd love to say I marked it out 1st, didn't do that either. Just cut it out with the jig saw and cleaned the edge up with a scotch brite pad.
Another positive I noted was a reduction in zumbers stuck to my visor. Win, win.
Ridaz, Martin and I have an understanding. No tongues.