Lot's of good info on LX200 here (not sure if meade have upgraded the mount in the interum for the "R" ) but the PE info is about half way down the page.
http://www.richweb.f9.co.uk/astro/notes-2004-12-07.htm
I doubt that the AO would be able to deal with 50 arcsec on it's own. Probably after PE training it would.