Hey guys, FYI: AR is going to reduce reflections to near 0, making it appear as those there is no crystal at all... But if the crystal itself has optical aberrations due to poor manufacturing (i.e. coke bottle effect), those are going to still be there and in fact maybe become more apparent. This is a problem I've seen on some Omega crystals as well. The best thing would be to find a higher quality sapphire domed crystal as a replacement. OFrei has a decent selection.