Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Try some heat. Don't melt the ally.More plusgas and leave overnight.
Six sided impact socket and rattle gun, if they are that corroded into the alloy they willbreak no matter what you do
Don't forget the socket/extension and crack with a hammer before attempting to remove. And copper based grease on re-assemble
I think they are called flanx drive