Well the brass funnel is done and installed, and better, it seems to work great! It took several hours to fab, very slow going. But having time to do it is no problem these days since we don't leave the house much.
Here is a few pics. It's not a thing of beauty, but hey, it works!
It consists of a short piece if 1/4 inch tubing for the feed from the smu, and two stacks of 5/16 tubing, which just fit the shell stack openings. The main body is a piece of 7/16 tubing pressed into an oval 14mm wide by 7mm deep. The end plates are flat brass. The body angles downward at 8 degrees so that smoke fluid hopefully runs into the smu.
I have a video clip but it will have to go on Youtube I guess as its a pretty big file. Later.