My Bernina is 6 mos old. Spent 2 hours today trying to get the BSR to work with either Sulky invisible or metallic thread. Can't remember how many different types of needles and tension adjustments I used. Broken thread, skipped stitches, etc. Finally decided I could not get there from here. Removed the BSR and finished the quilting free motion with no problem. Will be visiting the dealer tomorrow for a refresher course......