Well, I've got some news, as it did for Alison, the tape also worked for me. But it wasn't totally bullet proof. I was still getting some reflections. However, with some practice, and research, I think I have solved the issue!!
Such a beginner mistake, that it was probably the reason why no one mentioned it here - I feel a little slow! I had my strobes waaaaaay too far forward, and light from them was getting directly into the dome. With the adjustment, I think I may now be problem free!