Hey, all. I previously reported a failed attempt at using the pipe insulation over the poster tack on my XL domes. Well, I went and got the *rubber* foam this time (1/2 inch) and put it on my large domes... and it worked!
I had two layers of poster tack on the large domes already, so that sort of stands in the place of the caulking. I put the foam around the dome and used hot glue and super glue to seal the ends together. I then took off the plastic protecting the adhesive and pressed it to the dome (on the inside and the outside).
Last night I pumped with them for 1 hour 20 minutes (about twice as long as I normally pump), and my results weren't anything special really. I had some nipple pressure at first, like others have mentioned. My swelling seemed about the same or even less than a 40 or 50 minute session with the XLs, which was surprising. I think it might be because I wasn't pumping as hard since the diminished diameter would cause discomfort at a certain point. Because I pumped for so long, I ended up having some ring marks -- wide and slightly red. I removed a dome every 20 minutes or so to check redness, and it seemed fine after an hour so I went another 20 and got some ring marks.
I had been wanting to occasionally pump with my large domes again since I never did fill them and I think it'll be good to get that more outward pull that they give me. I think I'm going to be pumping mostly with the XLs like usual though. Thanks again, itsjust4fun91, for sharing this with us!