All set, installed the ssd (luckily it all went well), then i had already fitted the installer El Capitan on an external drive and don't the installation on the ssd... but, i must say that there is a strange freeze of the dock while it shifts to disappear when i shutdown El Capitan. Does this freeze happen to you guys too? Its not that the OS freezes, just the dock seems to freeze and then of course the os shuts down, it just looks like a small glitch!