When we take account of the camera's metering, "manual" is almost a misnomer, I reckon. George tried to tell us this quite recently but most of us didn't get it at the time. In manual, my viewfinder shows the amount by which the settings are off relative to what the metering is seeing. The range of that display is -3 to +3 EV, outside of which it blinks. So, when we dutifully crank the exposure settings until that display says "0.0" the
metering has effectively set the exposure, not us. And when we bias those manual settings for cats in coal mines or sitting on fresh snow, that display changes to show the amount of 'bias'. What I am trying to say is that,
by including the in-camera metering, there is effectively no difference from using aperture or shutter priority modes + exposure compensation.
To me "pure" manual would be estimating the exposure based on experience, the lighting and the scene content, then taking the shot.
Less "pure" would be the use of an incident light-meter but still the in-camera metering does get ignored.
Not saying you should do any of the above, Sandy, just offering a point of view ...