The challenger (20-1-KO10) tipped the scales two pounds lighter than he did ahead of his controversial world title defeat to Joseph Parker in September and three pounds lighter than Sexton.
Fury said: “Some people try and play mind games and get under each other’s skin and sometimes it can work but I’m not really interested in it. I only care about what happens in the ring.
“It’s crazy what a defeat can do you. It makes you that bit more hungry and I want to get back up to that top as soon as possible. You’ll see a different performance and a different fighter.
“I believe I’ll be world champion so I want to get through beating Sexton and then look to force a mandatory shot as soon as possible.”
Many of the headlines from the weigh-in will go to Fury’s gym-mate McDonagh, who was in typically outrageous mood as he strutted through a series of costume changes.
‘The Connamera Kid’ is returning from an eight-month ban against the unbeaten Peter Kramer and wore shackles and chains for a fiery face-off.
McDonagh said: “You’ve got to add a bit of razzmatazz. This is show business. I’m not just a boxer. I’m an entertainer.
“A lot of fighters just go on and on about how great their camp’s been. People are bored of it. Nobody cares about your story. I’m a more colourful character.”