I'm trying to make a Thien separator for use with a shopvac to serve as a dc for my bandsaw. Not ideal, but it's what I need to do for now.
The bandsaw has a 4" dust port. Ideally (because I already have these parts), I'd like to just run 4" to the separator lid, and then 2.5" from the separator to the shop vac.
Is this more or less advisable than converting the 4" port to 2.5" close to the saw, and then running 2.5" from there to the separator? Does it matter?
Any help appreciated.