simple answer,check everything you buy.period.if you dont have the required tools to do it,just take them to a reputable shop,spend a few coins and sleep well at night.its a crapshoot out of the box,may be fine may not.the thing is,if you are going that far,why settle for something you are unsure about? sort of like marrying a russian bride over the internet.you just may end up with helga the female ironworker from chernoble....