I bought that machine about 20 years ago, I think it had just been released. At the time there was an online group for it where I learned much about FMQ and that machine. The one piece of advice I never forgot came from a Brother tech via a member on the group. He advised for FMQ use a Stretch needle, they are ball point, meant for knits but have a longer scarf where the thread lays.
I have done that ever since, it makes a world of difference, I highly recommend it. Rarely a skipped stitch or shredding and if it starts to do that I know my needle has gotten too dull so put in a new needle. Can't say enough praise for the Stretch Needle & FMQ.