You were right!
I removed the front wheel and realized that the front left wheel was tough to turn on without any brake applied to it. I removed the disks, lightly sand them and reinstalled the OEM pads and I must say that the vibration is almost all gone. I will double check and confirm tomorrow after a full day of driving the car. I'm just amazed at how much uneven pad deposit on the rotors can create such vibration.
Would I be better to have a set of dedicated rotors for track usage or should it be ok to use the same rotors with 2 types of pads? (I intend to track the car for about 10 days per year)
Thanks to you all, Vince
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