i sent off my awful boss cs-3 compressor to the folks at www.pedalmods.com last week for a complete overhaul, including replacing the caps with high quality panasonics, fitting a burr brown op amp and filling my request to make it more bass-friendly.
the result ? they've turned possibly one of the worst pedal compressors going into a quality piece of kit. loads less noise and a lot more usable sweep of sounds.
quick turnaround and excellent updates as the work was taking place.
if you're thinking of having some pedal mods done, then i recommend you have a word with them.