Pretty cool story I found today of Eddie Van Halen helping out former Chili Pepper guitarist John Frusciante. John had a Pepper gig to play, and had just broke his last Wah pedal. He used the pedal for certain Red Hot songs, and John's guitar tech, David Lee was scrambling for answers. He then reached out to one of his friends who happened to be Eddie Van Halen's guitar guy; he mentioned that Eddie might be able to help him out, but he'd have to take a drive down to the "5150" studio.
Find out what happened, and get some Eddie Van Halen roadie advice at jeffects.com