Why don't you see if VSR will split the cost of a tear down at a shop of your choice? This would probably clear the air. If they say tuning blew the motor, then VSR doesn't really have a leg to stand on. On the flip side, if they find a manufacturing defect then VSR would be off the hook (the chance you risk making this public)? Just an option that gives both sides a chance to clear the air on exactly what is happening.
Don't take this as me not sympathizing with you, because i do. But IMO, you can't say definitively that something caused your motor to blow before you have even opened it up.
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