the power might be ok tony as they have three phase but 50 pins all being played will probably test it.
here's a bit about the venue
http://www.marrickville.nsw.gov.au/services/forhire/petershamtownhall.htmthere was a floorplan link as well but it seems broken now.
i would much prefer the week after (my sons birthday on the 8th) but moving it will be rough on those that have already organised and paid for their flights.
I haven't seen anything negative anywhere about it? few concerns that the auction might dominate the expo but i think that is a fair concern from genuine hobbyists. it would be good to model it along the lines of the US one which is very sucessful as many have mentioned (don't think they have any auctions)..maybe make the auction a side event that doesn't interfere with the exhibitors so people can choose how to spend their time most effectively and they can choose to play CI and talk to Nug rather than listen to an auctioneer. MHO anyway.