Two distinguishing aspects of the OEM rear spoiler is the small "weep" hole on the bottom side of either end of the spoiler. The other is the color matched attachment hardware plug covers on the underside next to the stanchions, I don't believe non OEM spoilers would have either of these.

 

One issue I still haven't fixed that's nagging at me is that the trunk skin buckles pretty easily with a bit of weight on the wing. The support plates aren't cutting it so well, IMO.
Any proposals on how I can better brace that part of the trunk? I could imagine using epoxy to glue the plates to the trunk (I used a beater trunk anyways). But....I'm hoping for a more graceful solution.

 

My replica has this weep hole on the inside-side of the end-plate. So the holes both face towards the central axis of the car. They're very small, and probably used when molding the plastic.

I don't think I have the color matched hardware plug.

I do think the replica's wing stand plastic molding has a slightly different design from the CR wing's. You have to look closely at pictures - there's a ton on ebay of the replica wing.
https://www.ebay.com/itm/For-00-09-H...-/323270013489

 

What difference did you notice? Also, how's the quality of the ebay CR rep wing? I am a step before ordering one.

 

How much would you say the OEM CR wing weighs??

 

This guide is still helpful in 2022.

 

Thank you! The wing has held up for me since 2012!

Now with new rear bumper to boot!

 

This is a very helpful guide and the new rear bumper looks great

I am also building a Type S as well, can you tell me the distance you used from the bottom edge of the trunk lid to the bottom of the "Type S" emblems, and the distance from the front top of the "S" to the right edge of the trunk lid? I want to get that looking right. Thanks in advance.

 

Should be in centimeters as you see in the pic. Hope it helps.

 

Here's also an official render, this probably differs from mine.