"We tried running him in the Lightning, but he found them too good, and he's right back in class now," Hayes said.
"There's a lot of managing with him. He had to get passed to race here in Victoria and that's not always easy to do.
"He's trained down at Pakenham because the facilities down there are so good. They have good flat tracks, good grass access, they've got that good back grass.
"He was very good for us down the straight and I think he's found a race where he should run really well after a nice trial where he trialled up really well. - Ben Hayes on Joyful Fortune
"He's nice and sound, and he's moving really well."
Former Perth sprinter Acromantula will be having his second start campaign for Lindsay Park and his first start down the Flemington straight.
Like his stablemate, Acromantula is prepared at Pakenham now.
"He's a horse that a lot of things have to go right with him," Hayes said.
"He's a very good fresh horse from our experience. He was super at The Valley when he flew the gates and got into a nice rhythm." - Ben Hayes on Acromantula
"He's trialled up nicely and I think he'll sprint well fresh."