I am a moon clip fan. For short, stubby, rimless, cartridges, the moon clip is excellent. For long, rimmed cartridges, I do not see the need.
I am not familiar with the CS-1. Because of that, I am guessing it uses a rimmed cartridge? I believe the advantage of moon clips are lost on the long rimmed cartridges.
But, as mentioned already, L frame cylinders are not rare. Have the alteration done to that. As for bead blasting, consider leaving it as is, or polishing it so you can tell at a glance which cylinder is in place.
Kevin