The stock spoiler doesn't put anywhere near John Goodman downforce on the rear. I remember reading it's around 30-50 lbs of downforce somewhere in Porsche literature.....and that's at very high speed not 60 mph. Apparently that's enough to break that wimpy aftermarket wing. I'm willing to bet the aftermarket wing generates even less downforce than the stock spoiler. The Gemballa unit looks pretty solid though.

In the manual it says 140KG, so roughly 300 LBs. Not 30-50. Im pretty sure the guys in germany know...

What page?

Well I ordered it!
 

After looking at how it looks on, I went ahead and ordered it tonight! Hehe... I'll keep ya'll updated as to any problems. First thing I'm going to to is TRY to break it off with bumpy-road driving fast + 120mph speeds. Wish me luck! I'll be doing this stuntwork SUPER late at night, like 3am down some freeway here. Hehe... :D