[DavidG]

If you mean denting the outer frame outward from the screws protruding too far into their sockets, the key is the length of the screws. I know this well from personal experience having done several roadster and phaeton rear window installations.

Whether it's the thick glass frame or the thin glass frame, original or reproduction, you should assemble the two halves without any glass in them and not have any of the screws "hit bottom". That way with the eventual addition of the glass and top fabric you'll know in advance that your outer frame is safe from being dented. Do not rely on anyone who furnishes the "correct" screws that they are indeed correct as inevitably they will be too long.