Originally Posted by
FBinNY
The statement is accurate as far as it goes. You do a fit in sequence. The saddle is set relative the the cranks, then the handlebar stem is used to set the reach.
That is the correct process.
Fit is an individual thing.
Copying another's position, even if was done by an experienced fitter for rider
#1 and both riders are similar in size and of the same gender, will not be as effective as using one of the several well proven fitting systems to determine what rider
#2 's actual requirements are.
The classic Guimard/Lemond system is easily available as well as several online systems. All will get a good "baseline" fit without wasting a lot of time & $ on component changes and provide documentation for future adaptation.
-Bandera