Thank you so much everyone! I just love this forum!!
I got a Janome 6650. I've tried the needles that came with the machine the purple tip ones, and wow, I HATED those, they produced the absolute worst of the problems (to the point I thought the machine would have to go in straight away after buying it, but then once I tossed the needle the problems weren't so bad). Thread breaking horribly, the machine slightly jamming a couple times, the stitches were somehow very uneven, it was bad. I switched to my normal Superior titanium 70/10, I also like the 80, I'll sometimes piece with the 70 and quilt with the 80. Honestly unless the fabric requires something specific I grab whatever I grab either the 70 or the 80. I have used their 90 too, but not as much, mostly the 90 sharper ones for the occasional batiks, which I don't really like working with as much as the regular quilting cotton.
I really liked the aurifil when I use the old machine, but I do find it to be very linty for me. With this one I just can't find my groove with it. I do have some of the C&C on hand so I might try to go back to that.
When going over thicker seams isn't it better to have a lower number on the pressure foot? When doing lighter/thinner fabrics I keep it around 2.5-3 and when I go over thicker stuff I have it closer to 2. (and with real thick stuff like denim I put it lower than 2) Is that wrong?
And Rob, thank you!!!!! That might just be the veering issue! I'm used to the smaller feed with my old Janome 6300 (5mm), going up to the 9mm might be the reason I'm struggling more with my 1/4" seam!! I really yanks the fabric over compared to my old machine. I'm slowly getting used to it, but it surprises me sometimes. haha.