Perfect Casting is an interesting horse who should still be on the upgrade. He has only run three times, winning twice and finishing second once (on his debut back in May). Although the form of his wins is nothing to shout about, he has shown plenty of ability and looks as though he is best on a firm surface when breaking his maiden in ready fashion on firm ground at Leopardstown, so he has been running at the big tracks.
Dermot Weld is a shrewd man and i always take note of horses he sends abroad, as he simply wouldn't bother if he didn't think the horse had a good chance of getting in the frame at least. As you said, it is a race he has won plenty of times in the past, and he knows what sort of horse it takes to win the race, so the fact he is sending this colt over there says it all to me.
The replays of his races: (look for the Moyglare silks, white sleeves, black body and red cap)
http://play.www.atr.servecast.net/pp..._05_16_05_1935
http://play.www.atr.servecast.net/pp..._05_30_07_2100
http://play.www.atr.servecast.net/pp..._06_15_04_1925