Tomorrow's weather is set to decide if Prendergast medallist Frank Stockley lines up for West Perth in the grand final at Patersons Stadium.
Stockley, who won the reserves fairest-and-best award on Monday night, was named on an extended interchange bench for the season decider.
The 23-year-old has notched 26 league games in four seasons, including six this year, and last played in the Falcons' senior side in round 22 when he had 16 disposals and 33 hit-outs.
Tall utility player Stockley would provide some much- needed support for No.1 ruckman Chris Keunen in the battle against Royals big men Paul Johnson and Scott Lycett.
West Perth coach Bill Mona- ghan said the forecast of early storms and scattered showers tomorrow would be closely considered when deciding on a final 22.
"Probably I flip between the two circumstances in terms of the weather," Monaghan said.
"Does the weather suit big blokes? Does it not suit big blokes? Do we need a bit of back-up for Chris in the ruck against two big bodies?
"We'll have to make a couple of hard decisions as you do in grand finals and there are always going to be people who miss out.
"We are pretty confident the 22 players who take the field will represent the West Perth Football Club really well. Whether that's Frank we'll just have to see."
Vice-captain Luke Tedesco is set to be rushed back by the Falcons side despite not having played in the league team since injuring a calf muscle against Perth in round 21.
While West Perth could make two changes, the Royals are a good chance to go with the same 22 that carried the club to an emphatic 63-point win against Claremont in the preliminary final last Sunday.
Midfielders Freddie Clutterbuck and Jamie Cripps are expected to overcome niggling leg injuries to play for the Royals.
East Perth coach Brian Dawson said the experience of West Coast squad members Cripps, Adam Selwood, Cale Morton, Scott Lycett and Blayne Wilson couldn't be underestimated.
"Adam Selwood's experience is pretty invaluable," Dawson said."It's not the sort of stuff you can buy in Woolworths so we certainly take that. They (West Coast players) have bonded really well with the group."