I'm not a fan of stit ch regulators. I've never noticed that the ones for sit down Fmq ( Bernina bsr or true stitch on Viking sit down long arm™) make nicer stitches than what I get withou them. I also tried using a Brother dream creator on their new frame with its stitch regulator and didn't think it produced any nicer stitches than what I could do without it. It could be that they are nice for someone who is just starting out, but I wouldn't spend my money on them.
Rob