I'm not real good at doing FM, but I've never had any tucks(knock on wood). I starch the fabrics for the blocks before cutting, and I starch the dickens out of the backing, then I tape it to my cutting table making sure that it's taut, but NOT stretching it too much, especially against the grainline. Then I spray baste, then put the top on. After that, comes the hard part, at least for me.