Brit-Tone HRO Upgrade to 2 Channels

This is the very first Hot Rod Overdrive (HRO) built May 9, 2005. It was built as a single Split channel offering a clean input and an overdrive input. The current owner requested a dual channel / foot switching upgrade with foot switchable solo boost be applied. It was an uphill battle and after 40 hours of work and trying two mechanical relay switches (both of which allowed overdrive channel bleed-through to the clean channel and the current Electronic (optocoupler) switching unit which was a bit noisy in transition from clean to overdrive, I have it about as good as I can make it.