Chicago pleasing Elliott
(Healy Racing Photos)
The County Meath trainer took the world's greatest steeplechase with Silver Birch in 2007 and reports his latest contender to be in the form of his life.
"It's all systems go to the National and we're looking forward to it," said Elliott.
"We're training him as normal, but we'll pop him over a fence the week before the race, but he seems to be in good form so we're very happy."
Chicago Grey, generally available at 20-1 for the Aintree spectacular on April 14, made his last public appearance at Gowran Park in mid-February when he was a staying-on second to Rubi Light over an inadequate two and a half miles.
Sizing Europe has emerged in good shape from his controversial Cheltenham runner-up effort, with his trainer Henry De Bromhead aiming his star gelding at the Punchestown Festival.