no - in fact I discovered I have more problems if the edge is basted than open. I trim my quilt right after it comes off the LA (because I use the LA table to do it). But I machine bind, so I'm sewing the binding to the back.
I attribute a lot of my success to using a straight stitch machine with a narrow foot and narrow feed dogs. I had more problems when I used my swing needle machine before I bought the juki.