I'm using handy wrought iron hooks of a couple of lengths to hold the dowel in place behind the warp and the cartoon. These have worked just great. I used the single pair early in the weaving when I had more length to the cartoon, then dropped the dowel down by slipping a second hook on each side as the weaving grew longer and the cartoon shorter.
The dowel holding up the mylar cartoon is resting on a couple of wrought iron hooks. I've taken the tool tray off for the photo and it's sitting on my sheepskin covered bench in the foreground of the photo.
The hooks also turn out to be a great place to park the bobbins to get them out of the way when I'm not using them.
I'd like to get this off the loom before I leave for the class I'm teaching at John Campbell Folk School--that starts on March 28--but I'm not sure I'll make it before I need to begin prep work for the class. I want to do new photos for some examples in my handout; my teaching assistant for this year will be coming to the studio on Monday to work with me on that. She's a graduate of the art department at North Georgia College & State University (her degree is in art education), has woven quite a bit of tapestry, and was an assistant at the Folk School a couple of years ago. I'm looking forward to working with her and those who'll be there in a few weeks.