Mostly just curios--the name grabbed me. As I have an 8 year old's sense of humor, 'pig butt' makes me grin. I know pignose makes some stompboxes but I don't know if they actually do what they claim which is put a 'legendary' 7-100 amp-in-a-box. Something like that with a booster goosing it?
A butler tube driver would be a fun project. I've never played one firsthand but you never hear anything bad about them...