An eventful day

I've managed to get my pattern for my new wholecloth together over the weekend and I am so desperate to get started on it. Sadly my machine has other ideas. It's having a strop. Quite an unusual one. It will sew perfectly with metallic thread but won't sew at all with masterpiece. I've had plans for a while to replace the hook assembly and this seemed as good a reason as any. A couple of hours later and a screwdriver to the face job done. Timed and new needle in place, it's exactly the same. Does this count as a good job? Well I replaced a major part with out doing any harm, and the old assembly does look like it has seen better days, but I had rather hoped this would have solved the masterpiece problem. I know I like machines with character, but I also like ones that do what I tell them when I tell them. I may just stick to customer quilts for a couple of weeks until it changes it's mind on thread again. I know it will, it always does. I did really want to get on with this quilt though....