I would trust it... on probation and assuming you've changed the cord - I think you said the original was too short after removing the corroded portions. Don't stick it in the knee lever mechanism but put it on the floor, sew in socks ad monitor for noise and heat. Sew slowly, that's the way you generate the most heat. I bet you'll find it's fine. The one for my 403 worked til (at least) the day I sold it more than a year later and I use that process to check / fix all of my pedals these days.