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 User subpage for major revisions? 

I keep trying to make a huge revision to an article, but my comp keeps crashing and I lose all my sources open in other windows.  I created a subpage to save it until it's ready to publish, but Wikipedia:Subpage#Disallowed_uses says that's not allowed?  I thought I read somewhere else that they recommend that, and I know you did it so...I'm confused.  Is it ok for me to use a subpage for a major revision?   (talk | contribs) "