I received my dustbags today and tried to put them on. Unfortunately what I received must have been a training version for a first-day employee. It was covered with red marker ink indicating where they were supposed to sew loops and seams. Unfortunately, the person marking it must have also been having a bad day. Some loops were marked and sewn 5" apart, while others, were more that 24" apart (trust me, I measured). Needless to say, I have requested an exchange from Amazon--let's hope Delta's QC folks don't let more of these out.Also typical of the last few teims I purchased from Delta, the packaging and/or directions don't match the current state of the product--this one came in a package that said top dust bag, so I started to worry, but then there was obviosly the bottom bag in the package as well.