I’ve noticed that replacing pedal felts is a standard first step in a professional regulation. My question is: if they’re not significantly worn, why?
My profession is pipe organ builder. When we replace bushings or any other felt, we do it only when worn out, because any replacement will pack in over the next few years, and then require yet further adjustment after the packing occurs.
So what is different about harps? If the wear level indicates that the cloth will easily last without tearing or failure for several more years, why not regulate with the existing felt? It looks like new felt would just guarantee the need to reregulate after the new felt packs in.
I’m not at all attacking the practice; just don’t understand what makes the harp application different from everyone else who uses bushing cloth.