In this video, John Petrucci's guitar tech, Maddi Schieferstein, gives a rundown of the guitar rig that was used during Dream Theater's 2014 "Along for the Ride" tour. The Radial J48 can be seen at 1:50.
At 1:43 , Ezra's pedalboard is visible. On the left is the Radical J48. An explanation of his signal chain is included below:
http://postimg.org/image/ye7bd8sdd/ (Not super highh quality, but clear enough)