I was also curious about the bobbin genie some time ago and Ritzy kindly sent me a few spare ones because she didn't think they helped with her machine particularly, as I recall. However, I found that they didn't seem to make a lot of difference on my Janome Horizon either. As to Bottom Line in the bobbin versus Aurifil 50wt cotton - I think that Bottom Line works particularly well with the polyester threads like Superior Rainbows and monofilament thread. At least that is what I have found. Hope that helps Lynn, and it's nice to see you again.

Thank you, Renata, for your quick and helpful reply! It is very helpful indeed! I don't really have a specific problem that I am looking to solve, just wanting to do whatever might help me move toward the elusive " perfection". I am relatively new to FMQ but I'm fairly happy with my results so far. However, there always seems to be some aspect that could be improved upon. I usually use 100% cotton in top and bobbin, typically Masterpiece or Aurifil. I did try Bottom Line in the bobbin and I don't remember exactly what the problem was but it was disastrous. Perhaps I should try it again with lower tension. I just keep hearing from "experts" about the Bobbin Genies so I thought maybe I should give them a try. I think I'll pass on them, at least for now. Thanks again, Renata!

I wrote to one of the well-known FMQ artists who do a lot of online video instruction and sells the bobbin genie about using it in the Bernina 830 and they said yes (she did not own an 830); HOWEVER, when I went back to a Bernina specialist and asked about it, they told me it was a no-no. I have an 830 and frankly, I found that I get the same results by putting a net over my thread when needed (like with ISACORD thread--polyester), AND thread the bobbin for embroidery. With Bottom Line in the bobbin, sometimes I have to tighten my bobbin one notch (one click to the right). I have not felt the need for the bobbin genie. I have experienced the bobbin genie when using my sister's 440 and it's nice there, but there are other ways of avoiding bird nests on the back of your quilt without the bobbin genie with your 820. Hope this helps.

I keep hearing about the wonderful results from using Bobbin Genies and I just finished watching a video where Sharon Schamber recommended them. I have a Bernina 820 and I'm wondering if I can use a Bobbin Genie in the unusual bobbin case of the 8 Series machines. If so, do I get the regular size or the size for the M bobbins in a long arm. The 8 Series bobbins are bigger than a standard bobbin but I don't know how they compare with an M size bobbin. Any advise would be appreciated!