[ QUOTE ]
Thanks bighly, have after 10+ yrs finally acquired a pair of the early one piece perspex sidescreens, now making up new ones,
[/ QUOTE ]
It is only my opinion. I had one piece Perspex side screens once. They are hard/impossible to keep sealed to the top, especially at any speed, are a royal nuisance to open or close, like roll up windows that won't roll down, & have a down sweep rear contour at the back that makes for very little head clearance when entering or exiting, Unless uou have an extra short neck. They work even less well than the original BN1, BN2, plexiglass/canvas affairs, which can at least be opened. If you put the solid plexi screens on a hardtop, you will almost certainly need to install some kind of external door latches to get the doors open.
The later aluminum framed sliding side screens are better in all respects. I would have the window openings in the new top contoured to match the later screens which have a higher rear corner, & use later aluminum framed screens.
I agree with Michael on the proportions, side & rear window contours. I guess everyone has different preferences but these things are very hard to change later.
D