Thank you so much for this info, Mickey. You are absolutely right, the plate where the tensioner is came off so I got behind there and was wary of the tension unit as I haven't seen one like this so I will take your advice and not fool with it if I don't have to. I will pay more attention to around the belt. I did see that manual but being the dinosaur I am who doesn't shop online I may have to break down and be dragged kicking and screaming into the new world. The car polish I think I will try on one of my smooth machines first for practice. I will have to figure out the threading and needle direction. The bobbin is wound the counter clockwise, similar to the 301 so thread may go from right to left? I will check out the Victorian Sweatshop forum too, I thought this was a store!! Thanks for taking the time, much appreciated, Lynda