Aish said his focus was firmly fixed on his Grand Final.
"I'm going to be here for a couple of days with the boys and then head back," Aish said.
"In some ways it can make it easier. Grand Final week, I can come here and let that take a day off the week and take my mind off it.
"I'm pretty set with winning the premiership with Norwood and then the rest will look after itself."
Aish and Billings are likely to be among the first five names called in November's draft.
Until then, they will contend with "the longest job interview in Australian sport", as AFL national and international talent manager Kevin Sheehan described it.
Sheehan officially opened the 20th draft combine by addressing the players on Tuesday.
Some 111 juniors will take part in the combine over the next four days, along with five international hopefuls.
One of those is American prospect Mark Cisco, who stands at 207cm and 112kg.
Cisco has worked closely with Paul Roos during his time as coach of the Sydney Swans Academy, after taking part in a trial at an American combine in April.
He hails from Columbia University and he has a basketball and gridiron background.
"I think the thing that really popped out at me (about AFL) is that it's a challenge. I've been playing basketball my whole life and this kind of popped out at me I could really push for," he said.
"It's one thing that I could do that's different to playing basketball in Europe."
Cisco says he is trying to model his game around Fremantle ruckman Aaron Sandilands, after seeing him live for the first time in last Saturday's Grand Final.
On Tuesday, the players had medical checks, and performed psychomotor tests before then moving onto the standing and vertical jump tests later on Tuesday evening.