I have an old iron Boss, and there are no problems in sewing skirts. I have built a 2´x 2´wooden flatbed connected to my Boss stitching bench", that is of great help when sewing the skirts. Also, I have had an aluminium frame Boss but got rid of it as I consider that a lousy machine, so my advice is, if you´re going to buy a Boss, find an old iron frame Boss, have it shipped to Tippmann´s to get it overhauled.