I have a Boss LS-2 line selector that i use as an A+B signal blend, and it works perfectly for this task with the individual level controls, etc. I generally have A set as clean and all the effects through B, But I am trying to figure out a way to use A or B or A+B. Sometimes I WANT an all wet signal depending on which effects I am combining without the parallel clean running into the other side. I know there is mode settings to select different ways the footswitch works, but I do not wish to be spinning knobs between songs every gig. Is there similar pedals with blend controls, but perhaps with more footswitchs to combine signals? I've really only seen A + B + C but with no way to control the levels internally. Would perhaps an extra LS-2 run a certain way in a parallel series or something be my best option?