Why wreck a perfectly nice roadster with unnecessary holes. The OEM rear windscreens are available on ebay if you look, I saw a couple the other day, "new". They trade around $180, they are a quality item, come with a protector sleeve and factory brackets with velcro fasteners. Great item. We have one on our car. We're fussy. Remember, you can't pay too much for a discontinued or NLA, OEM item.