Does anyone know if a walking foot can be repaired? I need to replace the part of the walking foot with the rubber grips, but cannot get the old one out of the foot. I have a new part and would like to make the foot usable. Any suggestions from anyone? Thanks. I paid $20 for the part thinking it would be less expensive than $140 which I am told a new foot costs. Maybe that wasn't a wise move considering time, etc. to try to fix it.