It is hard to keep up with the changes this rig has undergone in the last few years. In fact, by the time I get a picture taken, it is not long before something is added or deleted from the line-up. However, both the Echoplex Digital Pro and the Electrix Repeater hold down loop duty,a Lexicon Vortex adds primary processing power, and Zvex stuff has a pretty firm hold in the floor stomp box department.