DPM membranes should be on the warm side and on the warm side only. The reason is that warm air is able to hold a lot more moisture than cold air. You want to keep the moisture on the warm side and not let it go through the insulation in the wall and condensate on the much colder side, giving...
Well, there is not much more too it than what you see in those pictures. I dont have any measurements or drawings of the chute since I just designed it on the go. Here are a few more details as I remember them.
The transparent plastic is 1,5mm polycarbonate and the white painted stuff is 12mm...
I stumbled across this forum and this thread from a google search. I thought I might show what I have done for dust collection on my Wadkin Bursgreen AGS 12 table saw. It works really well as you can see from my demonstration video here. (well, I apparently cannot post links either).
My idea...