Enjoyed my Vevor Chamber vacuum sealer DZ-260C So far has sealed everything without fail for a little over a month.
Took the back panel off to expose the oil reservoir, filled to half way in the viewing glass/window. to adjust the level there is a screw on the bottom of the reservoir, when replacing the screw don't tighten to tight as it will make the O-Ring bulge out and leak, just enough torque seal. we have sealed probably 50-75 bags . we love the mylar bags with the easy tear open, zip lock(resealable), expandable bottoms. To watch the air get sucked out is so satisfying its like magic.