If they have to 'fine tune' multiple features, then, it is not yet working, no ?
Just because you plug it in and it turns on, does not really make it a 'working model' IMO......
Omce it performs the way it is 'intended' to, then it is a true 'working model' .
Savvy ?
I owe to smoking (cigars), more or less,
Through life the whole of my success;
With my cigar I'm sage and wise -
Without, I'm dull as cloudy skies !
Light up a stogie today !!