"Sin Rap Express pulled up well after last week's race and is learning all the time,'' trainer Shaun Parnis said.
"He is a big 37kg dog so has been slow to mature."Because of his size I did not really get started on Sin Rap Express until he turned two on March 3 and last week he was having only his second run in a full field and his second hit-out over 400 metres.
"So he should have plenty of improvement in him.
"I would have been happy if he had run the 400m last week in 22.80 so for him to clock 22.64, even though he was beaten, I was pretty rapt.''
"I am building him up to race over 520m at Wentworth Park when that track reopens,'' Satti said.
"I took a job as a security officer to pay the $20,000 it cost me to get the litter reared,'' Satti said.
"It was well worth it because while I thought I could raise pups, this litter reared by Marty Hallinan were at another level.
"They came back to my kennels looking as if they were ready to race immediately, yet they had not even been broken in.''