Yeh, its pretty fluid. I reckon there are currently 16 locks:
Rance, Astbury, Grimes, Vlastuin, Houli, McIntosh, Martin, Edwards, Cotchin, Lambert, Nank, Lynch, Jack, Rioli, Prestia, Caddy
Then Broad/Castagna/Stack/Balta/Baker are almost locks (they are definitely in my team)
Either Bolton or Ross make up my 22 (probably Ross for the grunt), but it could also be Ellis, Menadue, Graham, Butler, Short.
Looking at it Markov is now a long way back, Short should not come straight back in and I don't find a spot for Ellis if everyone is available and playing well. If Menadue plays well for the next couple of weeks he may be hard to shift.