Here are some pictures of Pauls quadcopter that he recently converted from 4 ESC’s to 1 ESC. The new ESC is a Hobbywing Skywalker 20A x 4. Paul reports that so far the single ESC is working well and reduces the amount of components on the quad. Listed below is a link to a RCGroups discussion about the new ESC;
http://www.rcgroups.com/forums/showthread.php?t=1716257
The single ESC makes for a super clean set up. Paul also reconfigured the mounting for the ESC and battery. He reports no “jello” on the 720 x 60 fps video with the new camera set up.