If I wanted to run my Rusty Box as a preamp into the effects return on my 800rb, would it be okay to use instrument cables for both connections, or would I need a speaker cable to go from the line out on my rusty to the effects return on my 800rb? Also, when running my rusty like this would it be okay to run other effects like my Rat Tail before the rusty in the effects return, or could this damage my gear? Thanks.