I’m looking for a portability solution as well. Because I will be moving my bar with great regularity, I want a solution that will be permanent but not one that will permanently put pressure on the wheels. I found this on Youtube and I’m seriously considering adding a similar frame/mechanism around the bottom. I’ll put the lever on the side that will always be against the wall and actuation will be on the bartender’s side. I’ll post picures if it works out.
http://www.youtube.com/watch?v=122w40ZBrJg
Adam