IMO flat packed is the way to go, think BAA sends them rolled, you would have to ask to be sure, i know someone that got a BAA one for hes TZ wasn't real happy about it & took a while to flatten out, 
I fitted one that came flat packet, fitted 1st shot with some Very Minor trimming had to be done,
Yeah I got one from BAA last week and it arrived all rolled up. I have it sitting flat now under some stuff and will look to install when I get enough motivation up to start pulling apart the playfield. haha
I was actually wondering whether I would have to take the cliffy protector off the out hole, put the sheet down then reinstall the cliffy over the top.
