I have just read all these 401 threads from start to finish, and bookmarked too...what a treasure trove of info.
Since I have a lot of irons in the fire, I haven't started refurbishing mine; when I got it a couple months ago, it works (sews), but there is a low growling of the hand wheel, I forget what that is called, sounds a bit "reluctant".... so I think it needs a complete going over even though the seller said it had been 'gone over' at a sewing machine shop. It doesn't *sound* like they did a thorough job. Pun intended.

Thank you O experts of the QB!