So.. I have a free upgrade to Mountain Lion, and am planning on going through with the upgrade. I'm also planning on putting ML on a Dork Stick (Flash drive), and going ahead with the upgrade. I am using a 11" 2010 MBA Ultimate, and do have the Recovery Dork Stick for SL. Question is, will I be ok to install ML, then take it off and put SL back on if I am unhappy with the performance of ML on my Air? I suspect I will, but I've been wrong on many occasions, so I am turning to the wisdom that is the Mac Lovers of MacRumours. If I am wrong, do explain, but please... be gentle.