An obvious copy of your idea - I have used the original version in my Jet DC for over a year and it works great. I think it is time for you to produce a retrofit version for the various dust collectors out there and get a patent. It is inconceivable to me that Jet is not offering a retrofit cone baffle but wants you to buy the entire unit.
Good luck and thanks for a great design.
JB
Good luck and thanks for a great design.
JB