Good info, Joe. I have been hoarding Boye #10 needles for my Davis HAVF1, and I now have about 20 or so, I think. I am not sewing on her, as she doesn't have a treadle base yet, but hope to some times this summer. Need to convince DH that a treadle base that will take 2 or 3 different machines is a "MUST HAVE", rather than a "would be nice to have" item!! LOL