I have a 2006 Millennium and the needle down button works as expected for the first 3-5 minutes of operation, after that when I push the needle down I never know if it is going to go down once, or make multiple stiches from 2 to as many as 18. I have been told there is an adjustment screw to correct that issue, however, the only manual I have that address this was revised in 2008 and shows a small hole towards the back of the machine on the right side (as viewed from the front of the machine). Nope, not there. Is there indeed an adjustment screw and if so where can I find it. Sue O PS This is a used machine that I just purchased and it stiches beautifully, so if I can resolve the multiple needle down stiches I will be a very happy APQS owner.