Like I said before, if the changes don't affect either a. the value (that you might try to claim) of the car, or b. the car's performance, I can't see why the insurance company would need to know.
1. is okay if it is actually parked on the drive some of the time.
3. Could be a genuine mistake. You take out the insurance thinking / hoping you'll do under 8k, but it actually creeps over.
6. I'd say is okay, if the modifications are just superficial and affect neither the value or...