My neck is loose does that effect the way my sax plays?
Of course it will… the neck fit is one of the most important things that needs to be correct for the saxophone to play at it’s best. Too loose, too tight, out of round, all these things can prevent the saxophone from playing the way it should.
To fit the neck correctly takes time and is a job you should leave with the repairman so it can be done correctly. Metal has a memory and the neck can need to be fitted several times before it holds the fit. This is a job you will need to trust your repairman to do right. Each repairman has their concepts on how the neck should fit so you are at their mercy…