Does anyone know of a good schematic or layout for adding reverb to an amp that doesn't have one? I don't mean the kind that are add on units that attach to the side of your amp, but an actual point to point wired unit that goes inside the chassis. Specifically inside my peavey classic 30 chassis that I am gutting and building a Lightning clone into. I know both sides of each 12ax7 are being used on the Lightning, but I will already have an extra hole that I would be plating off to add another one and can cut a hole for a second if need be... I am just not sure what I need exactly. I can read and understand a schematic, but right now reverse engineering the solution from an amp that has reverb is just out of my ability at the moment. Thanks!