good suggestions ... the bigger needle (and, just because a needle is new, doesn't mean that the needle doesn't have burrs - - nothing is perfect <g>)
The hopping/darning/embroidery foot (and, I found out that if you don't lower the presser foot, even though it isn't touching the fabric, your life won't be worth nothin'! <g>)
And, slowing down ... not moving your hands as fast as the machine is going ... a little like patting your head and rubbing your tummy, but a consistent, moderate speed will make a nice stitch, (a good tip even for those of us with stitch regulators )
And, bring your bobbin thread up to the top of the quilt BEFORE you take off quilting ... it is the only way I know of to avoid a rat's nest in the back, and if you have never had one - - you will ... even quilting machines require that one step ...
Enjoy! <wave>