Some of the wiring looks a bit frayed.....not totally bad, but it may cause a ruckus after some use....
I've acquired high heat wire for my antique deep fryer at a appliance parts shop...these guys got everything.....might could pick up a replacement knob at a place like that too....check around your area & tell them how you're using it.................
The wire is not cheap, like $3-4 a foot, but it lasts a long, long time....