Help sexing 5 month old buff

[Shibainu22]

I have a 5 month old buff gosling who I am thinking and hoping is a male to go with my 2yr old pilgrim female. He is heavier than her his neck is thicker so I’m hoping he’s a boy. Anyone on here able to sex him?

 

[Jenbirdee]

my guess is gander because i can see his “knees”. the lobes hang lower on females.