Chris M, you said that the hole was too narrow. I noticed from your pictures that you are not using a V5 Kyberlight; you are using one of the older ones. I suggest buying a V5 Kyberlight.
I have purchased 2 Saber sets in the past that included this Emitter and BOTH have had defective Plasmafier Emitters. The emitter will not slide onto the saber, as the diameter of the inner hole is too small. I can't even force it on without damaging the saber. I've brought this issue up with customer service. They sent me a new one, but it had the same exact problem. Perhaps the issue has been rectified since my original purchases, but I cannot say.