Re:Why cant I get a vacuum like a regular vacuum bag?

I would like to suggest that perhaps one should make a smaller 45 degree seal on the two outside edges of the bags prior to the final seal. Then cut off those two flaps as they are no longer of any use. The meats are inside at this point. Then insert your tube extention and press up to or over the meat and begin your final vaccum seal. Once the timer count has indicated as instructed lock down your bar and you should have a good tight vaccum. I use a clip made of larger paper clips folded into shape to give me a longer tube extention. They fit inside the extender tube, and when the vacuum is completed they remain with the meat inside the bag. You can boil them later and reuse the clips.
Try that as well.. or use two toothpicks placed inside the outer edges of the extender tube.
If you e.mail me, I can send you some photos..
woodchipper2@mchsi.com
Good luck.