Third behind Native River and Might Bite in the last month's Cheltenham Gold Cup, the JP McManus-owned eight-year-old is officially 9lb well-in for the world's most famous steeplechase and disputes favouritism with several bookmakers.
Martin told At The Races: "We think he's fresh and well and I think he's come out of Cheltenham good.
"All being well, we'll send him on Thursday. Fingers crossed he'll run a good one and get a bit of luck.
"No matter what you have in hand, you just hope he avoids bad luck and if he gets his own little bit of luck, he could run a really good race."
Anibale Fly is third in the weights with 11st 7lb on his back, but Martin is unconcerned by the burden.
He added: "He's a big, strong horse and he carried more weight in Leopardstown when he won at Christmas (Paddy Power Chase).
"Weight shouldn't be a problem. It's all about luck. If he gets good luck and avoids bad luck, that's what we need."
Stuart Coltherd is increasingly hopeful
Captain Redbeard can become a second successive Scottish-trained winner of the
Aintree spectacular.
The Selkirk-based handler revealed he has received support from compatriot Lucinda Russell, who struck gold with One For Arthur 12 months ago.
Coltherd said: "He's very well. He did his last bit of work yesterday (Tuesday) and I couldn't be more pleased with him.
"He seems in good form and if we get a wee bit of luck in running, who knows?
"Right from day one Lucinda was always full of encouragement and advice if I needed any.
"He's the best horse I've ever trained. He does things at home no horse I've ever had could do. I really do think he's got a live chance."