I don't know if all bagless vacs are the same, but Dyson is not much use
for DIY. If you create fine dust then the filters clog as quick in a
flash.

The Henry filter is a circle of material about 50cm in diameter. It is nigh
on impossible to clog and you clean it by shaking it over the bin (outdoors)
when you empty it after using it bagless. I imagine it won't require
cleaning if you use bags.

Christian.