Sounds good Junco.
Well, i have only completed 1 expert map on mann up, (other 2 played like zillion times and never thru) but have had good luck with normal difficulty, usually get thru them.
Well, i found 2 videos on youtube where people win this nighmare "Wawe 666" so it is possible.
Edit:
No way... Just had a good crew on server and we got 'till last medic heavys and then we failed... Just a handfull left...
And we started again on different tacktic and it was good until my fricking internet connection failed!
I have like one day per year internet connection issues and why this has to be that day when i would be home and geared up to play...