I have recently purchased a Jones 365 Foreign machine, as I was tired of snapping countless needles on my modern Brother whilst sewing multiple layers. It’s in super condition, but didn’t come with a manual. I have searched online to no avail and wondered if anyone might have one? I’m having a real nightmare trying to keep it threaded, the problem is coming from the tension disks which the thread goes through. The thread pulls through fine after I have re-threaded it all, then I come to sew and it won’t feed through the disks, causing the needle to come unthreaded every time!!! Any help would be very much appreciated; thank you!