If you want to experiment with dielectrics, you might want to try using an old BIC style pen barrel (clear plastic) and cut it to fit snugly within the feed throat. I experimented many years ago when I had access to the Atlantic sats, and found it improved the signal over the standard dielectric plate. Doesn't sound logical, but it worked for me. Also, you might insert a 1/8 inch length metal rod to each end of the BIC barrel. It seemed to help on some weak sats. Good luck, and I sure do miss those sats.