Update 1: Tires
The pics pretty much explains why I had no grip at SOW. It seems either these tires passed the usage period or not dedicated for track use.
Update 2: Spacers and loosing lug nuts
I had my 15mm spacers installed at ACG San Diego, if you look back my journal you will see I had complainted about the lug nuts kept coming off. I apologize for the mistake and false complaint. The reason why the lug nuts kept coming off was due to they used the incorrect bolts as you can see from the pics. Basically the stock stub against the wheels, that's why. All I wanna say is WTF!!!
Update 3: finally my own shop is up and running so i can do all the works together. I will have more chances to do R&D for track in the future.