Re: Fundamentals
I don't know about the specific for this model (in terms of where the switches are), but there will be an electric trim - it's exactly what MCAS uses to trim the aircraft. The problem is that disabling MCAS is by turning off power to the electric trim system. So MCAS goes wrong, you have to power off the very system you need to recover from MCAS having gone wrong.
That alone should have raised warning flags to those designing the system.