Paintball is on target to defend his Paddy Power Imperial Cup crown at Sandown on Saturday week.
The six-year-old sprang a 20-1 surprise under Noel Fehily last year, sprinting up the hill to win by nearly five lengths.
Connections decided against going for the bonus at Cheltenham and sent him to Aintree instead but he was well beaten there and in four subsequent races. However, trainer Charlie Longsdon believes a further breathing operation will help him get back to his best.
"Paintball will go straight to the Imperial Cup now," said Longsdon.
"We've given him another wind-op and I hope that will help.
"He's only 1lb higher than when he won it last year and he's beginning to work like a really nice horse again."
Tominator, a good winner at Sandown earlier this month, could also run in the Imperial Cup.
Trainer Jonjo O'Neill said: "I might put Tominator in, as he's off 127 at the moment and he might not get in anywhere else.
"He's in good form and doing everything well at home."
3 September 2015Henry Candy errs on the side of caution with Limato
Wayne Lordon retains faith in Gordon Lord Byron ahead of Haydock Sprint Cup
Nigel Twiston-Davies eyes up Cesarewitch bid for Sands Of Fortune
Promising Rosina to be give Flying Childers entry by Ann Duffield
John Oxx retires My Titania
James Fanshawe delighted with winning start for well-bred Fly at Lingfield
Willie McCreery open-minded on Devonshire plans
Brendan Powell: Dark Emerald sparkling for Haydock clash
Buratino and Washington DC star in Newbury's Mill Reef Stakes entries
Newmarket's Joel Stakes an option for Clive Cox's Kodi Bear
Candy hopeful that La Rioja will handle soft Salisbury ground
De Sousa takes Haydock Sprint ride on Magical Memory
Stoute's Cannock Chase likely to step up in distance
2 September 2015Sabrina Harty watching ground for Doncaster raiding party
Vengeur Masque facing crucial St Leger workout
James Toller admits 'relief' at training retirement decision
ARC planning new stand for Bath racecourse
Simon Dow savours Epsom 'fairytale' with El Campeon
Olly Stevens rocked by Extortionist death
Gleneagles given Breeders' Cup Classic aim by Aidan O'Brien
Dandy Nicholls has Haydock in mind for Sovereign Debt
Beautiful Romance flies Godolphin flag on Champions Day
Jane Chapple-Hyam facing Cesarewitch dilemma with Twisler
Sam Waley-Cohen reveals Long Run hunter chase plan
Barande-Barbe eyes Champion at Leopardstown with Cirrus
Dettori likely for Danzeno Haydock ride
1 September 2015Sore Sumbal swerves St Leger at Doncaster
Goodwood winner Alamode beguiles Marcus Tregoning
Hannon plots Curragh route with Moyglare-bound Great Page
Autumn aims for Meade's Rookie
Turner confirms retirement plan
Mullins hails Fly achievements
Cadran target for Litigant
Park option for Naadirr
Cadeaux leads Cup contenders
Turner calls time on riding career
Pendleton so close to dream success
Whitman lifts Trophy for Johnston
Hobbs stars in Kempton entry
Mullins hails 'legend' Hurricane
Super Fly bows out
Belardo has six appeal - Varian
Time called on Telescope career
Charline chasing Curragh cash
31 August 2015Haydock option for 'Frankel' winner
Hurricane Fly: Best moments
Maguire making good progress
Channon seeks Divine intervention
More injury woe for unlucky Russell
Balios finished for the year
Reason back in firing Line
Newton Abbot washed away
Beloved bounds to Supreme success
Ton-up for De Sousa
Approval for new Yarmouth track
Hint takes Cambridgeshire glory
Bocca back in business
Leger hope Sumbal beaten in France
Tower-ing performance from Williams
O'Brien works his Magic again
All eyes on Pendleton at Ripon