Arriba-Arriba looks the solid form keystone to the final leg of Sunday's Sha Tin Triple Trio for which there is a guaranteed jackpot of $30 million. As it is Chairman's Prize day, the Jockey Club has decided to top up the TT jackpot from their reserve fund, hence the $30 million guarantee. It is going to lead to a final pool of $60 million or more and the likelihood of untold and life-changing riches for some. Arriba-Arriba returned from a spell to run a good third to Full Throttle and Meridian Star last time out and looks to have struck a much easier mile contest on Sunday. His form all season has been most consistent and gate 14 is not a worry as he's the type to be slowly away anyway. Trainer Peter Chapple-Hyam has booked the in-form Dougie Whyte for the ride and that can only help. Traveller Star has had plenty of excuses. He should also go well. He's either been on the dirt or trapped off the track in his races, but should get the run of the race from barrier two. He has continued to look good in the mornings and could be the one with most scope in the race. The other improver is Eastern Express, who has been crying out for a return to Sha Tin. He did put in a big run over the Happy Valley mile, keeping on well against the bias, two starts ago and since then patently found 1,200 metres inadequate. Sunday's mile on this more galloping track should be ideal and it should also suit Greenmore. The topweights should dominate the third event which opens the TT. Good Message will like the return to Class Four and trainer John Moore is making use of apprentice jockey Philip Cheng's quite handy five-pound claim. Kudos is starting for the first time for the Andy Leung Ting-wah stable. He has strong form as it is but with these stable changes so often working the oracle, he could even be banker material. He's looked good in work for Leung. Supreme Cat is racing for the second time for Tony Cruz, for whom he won well first time out. He seems to have thrived since joining the championship-leading trainer and on that basis can be expected to see out the 1,400-metre trip. Jewel Box is improving all the time and could prove hard to run down if he's allowed to roll along in front from barrier five. Full Throttle, Lion's Share, Return A Smile, Victory Drum and Big Mac could be the five to take against the field in the fourth race, the middle pin of the TT. Full Throttle has been racing really well all season and seemed to go particularly well for Weichong Mawing last time when ridden cold to win a highly competitive contest. Lion's Share looks to be on top of his game and could well be suited by the Sha Tin 1,800 metres. The Ivan Allan-trained pair of Return A Smile and Victory Drum should both like the Sha Tin mile and have been catching the eye during trackwork. Allan's stable is very much in form. Big Mac would have finished closer last time but for being checked in the home straight. He's become potentially well handicapped and his recent run was a much more competitive effort. The bottomweights, Winning Supreme and Sound Gallop, could be the best of the others.