DO NOT USE ANY TYPE OF CA KICKER OR ACCELERATOR TO GLUE THE LENSE INTO A BEZEL!!! The lense will melt as if you put acetone on them. I found out the hard way
If you need to make the CA harden faster or to try to fill a gap, use baking soda. It will instantly harden the CA. This is an old modeler's trick. It came from a master model builder.
I try to make the bezels a very tight fit around the lense but due to a lack of tight quality control of the lenses. I get a loose fit every now and then.