I let this discussion about ET and the wing etc go when I read it last time- it was an old thread by the time I got there... But to read this S*&t again? - ok you got me this time.
Let me first say that if someone was trying to have a lend of all of us, this is the type of thing I would expect. But taking his existance and circumstances as being for real...
ET- I can't imagine how you got retreads for the LIB GT. First, what maniac car tyre dude put them togeather let alone sold them to you. You could have been killed! They have a speed rating for a reason- retreads have no speed rating let alone the w minimum that you got with the re050 standard aussie spec fitted (and should never go below when refitting tyres). Check this link- both speed and load ratings are the two numbers on tyres that are most commonly misunderstood or ignored.
http://www.tyrepower.com.au/tyre_load.aspx
You are seriously F(*^kig lucky to be here to be able to pull our legs- if you are claiming to have gone fast enough in that GT, that you belive the positive downforce (possibly) generated by that wing had an influence on the cars' dynamics leading to tyre wear.
Get talking to Subaru ASAP, you must have data from your windtunnel that will blow their minds! Your (what must have been) very expensive development budget for the wing (to produce such an enormous effect) should be put to greater use than being the unsubstanciated but clearly unmittigated sucess that it clearly is.
Wings can have a positive relationship with the stability of a car, but racing teams have years of data, that has been very time consuming to get (expensive), that tells tham where to start angling it from, and very small parts of a degree change is used to get a great change in the effect. Again get a job with someone where you can put this experience to better use...
There is a 99% chance that all you did with that piece of ricey pornstar wing is reduce your top speed due to drag...
Oh sheit. now I'm back to thinking that it's me that has been taken for a ride...
Most of the forum users know at least someone else on the forum. Can anyone vouch for this guy? Seriously- I'd hate to think that i was upsetting someone who needed such a large check with reality...

Whiteline rear sway, King lows, Custom quad tip muffs, Subi sport grill, HID's, Boost guage, JL slot port 12" off the standard mac, RB3l 18's ezeflash tune 150.9kw@4w 15psi 36degC...