"He seems happy here but I would also expect him to be more at home as the series continues as he gets more used to the place," says Purdon.
Marcoola wasn't the only newcomer to truck through Purdon's front gate on Monday, with former Easter Cup winner A G's White Socks having joined him for the series from the Greg Hope stable.
"He is a lovely looking horse and has come up in good condition, as you would expect from the Hopes."
Regular drivers Sheree Tomlinson (Marcoola) and Ricky May (A G's White Socks) will retain the drives on the pair for the series.
Purdon is happy with his long-time stable series reps of Mach Shard and On The Cards although both face tricky draws on Friday.
Purdon would have also had Ball Of Art in the series and was keen to start him had there been three heats.
He was only withdrawn after the Inter Dominion Council decided to reduce the pacing series to two heats.