Please forgive me for being a noob on the forum. I have question regarding the 4CM method and using the send and return blocks. I am going to use a combination of my amp distortion, clean, and the clean from the Helix into the effects return of the amp. I will use different snapshots to accomplish what I want to do. I believe I understand all I need to get started configuring them except the send/return blocks for using my amp as the preamp. I watched Richie Castellano's video first and that is where I found the need for the send block to get my amp sounds... but I watched another video from Paul Glover and he has a return block set up as well. My question is ... Is there really a difference or a need for the return block? It sounds like in Richie's video that he has his tone and effects... and same thing in Paul's video... so thus the confusion... is the return block needed to use your amps preamp with the helix?