Jason Waddell is not usually one to do things by halves.
But for emerging star sprinter Mosse, the 26-year-old Cambridge jockey is willing to make an exception.
In fact, he's willing to make any sacrifice necessary to ensure he continues his association with the giant O'Reilly four-year-old.
For the first time in more than seven years, Waddell will ride at 53.5kg - Mosse's weight for tomorrow's Gr III $70,000 The Aussie Butcher Concorde Handicap (1200m) at Ellerslie.
''I haven't ridden less than 54 [kilograms] since I was 19,'' Waddell said yesterday.
''But I'm a professional and I'm doing it for a good horse. I've been riding 54 kilos this season so it's only a kilo lighter than I've been riding anyway. My weight's good at the moment and I'm riding all the time so it's no problem.''
Waddell said he had gradually gone about taking off the remaining kilogram and was feeling fit and healthy.
''Pretty much, I just reduce everything by half really. What I normally eat, I'll only eat half of it at the moment and throw the rest of it away,'' he said.
''If I need energy, I'm still going to eat a chocolate bar but I'll just eat half of it. As long as you are burning off more calories than you are taking in, you can't be putting on weight.
''I've known about this for a long time and I've been working on this for the last two weeks. It's Thursday and I'm feeling pretty good at the moment. I've just pushed around horses on a wet track at Taranaki without any problem.''
Mosse is unbeaten in four starts and has opened as the $3 favourite for the Concorde Handicap, a lucrative price if Waddell's opinion of the sprinter is any guide.
''I'd only normally attempt to do it for a Gr I race, not for a Gr III. But he's just a horse I plan on never getting off,'' Waddell said.
''I want to ride him the whole way through his career because he's just untapped. He's a super, super horse. He's a Gr I winner in waiting.
''This race has come up soon enough though. This is only his fifth run and he's up against some pretty good horses and he's got to come from a bad draw. But the bad barrier is not going to beat him anyhow.''
Mosse's winning margins have been half a length, 2 3/4 lengths, a long neck and a neck but the diminishing margins as he has gone up in grade is of no concern for Waddell.
''He never wins by much. He likes to just get there and just floats. It's a bit annoying to ride him when he does that because it doesn't feel the best. But he knows where the line is and he knows how to get past horses.
''He still very raw. He's still green in his races. He flicks his head around when they go too slow. He's an absolute giant. He's 590kg of pure muscle. He's just a huge horse. He looks like a superstar and he races like a superstar but he's just got a few things to learn.
''That's why I'm always quiet on him out of the gates because he can really get up and truck. For a big boy, that's not the place you want to put him. I'm not sure where we'll end up from the draw but we'll just come back a bit - there will be speed on.''
Prepared by Cambridge's John Bell, who races the gelding with Hong Kong's Benedict Sin, Mosse has drawn barrier 11 in a formidable field of 12, which features last year's winner Durham Town, Gr I winner Planet Rock and capable sprinters Ginner Hart, Demophon, Rough Odds, Vincent Mangano and Kitt Ann Miss among others.
But Waddell doesn't expect anything to stand in the way of Mosse extending his unbeaten sequence.
''I expect him to win. And I expect him to carry on winning,'' Waddell said.
''Burgundy is the only sprinter around at the moment that looks capable of being able to beat him. It's easy for me to say that now until I get beaten, but I'm going to go into the race with all confidence that I'm on the best horse and I'm going to win.
''That's the way I look at it when I ride him and that's the way it's going to carry on, I hope.''
Waddell is currently enjoying one of his best seasons in the saddle. He is in second spot on the jockeys' premiership and credits the support of his mentors, Ascot Farm's Bruce and Maureen Harvey, and agent Darryl Anderson as key reasons for his success.
''Things are going along great this year. Darryl is doing a great job and I'm getting the support from all the in-form stables. I've got great horses around me and that's making things a lot easier.''
Waddell has restricted his book of rides tomorrow because he's riding light in the feature but expected the Michael Moroney and Chad Ormsby-trained quartet of The Hotz, She's Samashing, Heat Blast and Sinnfonia all to be competitive.