I just had my Brothers CS8072 in the shop. The feed dogs weren't working, the needle threader also. The repairman fixed both of those, and unknown to me the needle area was too low. He also adjusted the bobbin winder to fill the bobbin more fully. $99 and it now works like a charm. He said soon my machine would have had timing problems. I know what caused it. I had a straight stitch foot on and tried to sew a zig-zag stitch so the machine stuttered until I got it turned off. Did this several times over 4 years. Any repairman has to make enough to live(and I hope as well as I do) and to have a shop. If we don't pay repairmen enough, soon we won't have any and will have to buy new stuff all the time.