recently purchased a low mileage z4. drove first time this week all is well. pulling original potenza run flats as they were made in 02. replacing with Firestone firehawk indy. own a repair shop so a hoist is available. the drain hole on the nonmotor side is visibley seen and easily cleaned. the one on the motor side can't even be seen with a remote camera from top. easily accessed from underneath. am considering not reinstalling the drain as it seems to be protected. has anyone tried this.