Fitting a new system for trimming an aircraft but forgetting to tell anyone about it it is bad enough, when they do know about it and find out how to deactivate it they cannot trim the aircraft manually. Now it has all been brought into the open it is likely that the only way the Max is going to fly again is if the airframe is modified, which will need certifying, the cost of that is going to be cheaper than scrapping 800 aircraft - isn’t it?.