There are many things that end up being repurposed when they are finished being what they were used for originally. I think that whether the new use is respectful to what the thing originally was lies not in comparing the two uses, but in the intent of the user and what that use means to them. What is a pedal board (although at this point, I think it likely to be used as a synth board rather than as a drive pedal board) to a guitarist? I think if a thing like this was something that should never be repurposed, a church wouldn't have sold it. Since it was sold, I think a pedal board is a perfectly fine use. It's like a painter's easel. Like a writer's desk. Like a craftsman's bench. I think it would be more disrespectful to leave it gathering dust in the basement or to use it as a doorstop or something. If your music means something to you, so do the tools you make it with. It's like Brian May and his dad cutting up an old fireplace mantelpiece. It gives it new life.I'm just wondering if it is appropriate for that use considering that it used to sit on a church altar and hold a bible?