I have the Jet 1000B and it is worth every penny. It runs all the time I am in the shop and I never see dust in the air. The reason for this I believe is the filters; It has two, the one outside and the one behind it. The first captures the large particles; I clean this one sometimes daily Pic 2. The second has a large surface area to keep the air moving and is good down to 1 or 2 microns Pic 2. I clean this one every week or two depending on what is being done in the shop. I blow down the shop at least daily, with the Jet running most of the dust is captured by the unit.
There are a few things I will build for myself; I just do not possess the knowhow for this. I have had it about 8-9 months and think it has been money well spent. If someone wants to make their own, buy the filters and build it around them.
BTW Some dust will make it through all these filters.
Pic 1 the Jet unit
Pic 2 the outer filter
Pic 3 the inner filter
Pic 4 the inside of the unit
Pic 5 the inner filter in the unit turned on.
Wisdom: Where experience and knowledge combine and become one.
"We are all one decision away from Stupid!!"
"How often we sacrifice the permanent plans of God on the altar of immediate solutions"
I have a very good memory, just short is all.