Hurdy Gurdy Man's penalty for the Hobart win puts him on 56kg and gives those who finished closest to him their chance to turn the tables.
The Cleaner, who finished 1 lengths second has the same weight (57.5kg) today and third placegetter Geegees Blackflash is again carrying 59.5kg.
Weir also runs Lord Of Brazil in the main support race to the Cup, the listed George Adams Plate (1600m).
The ultra-consistent galloper has won seven of his past 13 starts and at his most recent outing at Caulfield was beaten less than a length by Budriguez at level weights.