I did not have to baste the twin size that I am working on now. I purchased June Taylor Quilt Basing Spray from Michael's. I put an old queen size flat sheet on my spare bed. Layered the backing then the batting. Carefully pulled back 1/2 of the batting, sprayed and replaced the batting, carefully smoothing it out. Same procedure for the rest of the batting. Repeated the same process with the top. I have had absolutely had no problem with it slipping. No basting pins or sewing basing lines. Quick and effective.