Hi gals, I just received my new Speedy 30 from Elux and I wanted to find a way to prevent the bottom from sagging. I don't really care for the Purseket for its functionality as an organizer but have read that it helps the bag not sag. Does the Speedy 30 hold up better w/the Purseket or will a regular cut cardboard do? I also welcome any other suggestions. I used to have a Speedy 25 and put a board on the bottom but it kept shifting so my stuff would end up under the board. Please enlighten me to do it the right way. Better yet, if you have pictures, that'd be great. TIA!