Hi, I have owned the original midi for almost 3 yrs. My question is how much does the manual filter cleaning improve the suction? I'm asking because I have only had to replace my filter once. And as a painting contractor I use it on a daily basis with my sander for drywall repairs. One more ? I seen a review video on this vac and he said you cannot just change out the filter, you have to replace the filter with the handle. Thanks in advance.