The old carbon pile resistor (button) pedal would get really really hot and fail to deliver current so I switched just the pedal to the electric one. The bakelite 3 pin connector and cord are the same. I don't have any motor grease on hand. Should I get specific motor grease or would PJ work? I recall some discussion about melting points and viscosity with PJ being comparable to older versions of grease. Am I recalling correctly?