VinnCo MkIII maglift system - Origins

This is a simple request: when and whereabouts did this happen on the Bombcast? I know it's pretty famous and became a t-shirt but my Google and YouTube searches didn't find anything.

So that's why I turn to you.

Thanks in advance

All I remember is that it was during one of the podcasts where they are talking about moving arcade machines, I believe. That should narrow it down to like ... 10 possible episodes? D:

07/23/2013 Bombcast is the first time he mentions it.