Circuit Bending a Hammond Organ
I modded a Hammond L100 a few years ago but it was only to the power amp section. I went in and gave it a total 80's hair metal extra gain stage. It was funny as hell. You know that sound of two fuzz boxes chained together that distort so much that they cancel each other out? That's what it did. It was like a Hammond that The Melvins would use. You could bypass it and have the stock tone if you wanted.
"It sounded better broken"