The problem I think you'll have with this switch is it's rather long @ 1.1". That will put the ends close to the opposing internal wall of the saber so be sure to use good shrink wrap to prevent a short. I'd look for a shorter switch.
A couple of years ago I found a similar switch...PURPLE illuminated ring just like US illuminated AVs....only it is 1.2" long so I never attempted to install. Still sitting in the wrapper. Would be cool on my VA saber if I could install it.
If you don't mind the higher profile - you can buy a Tall Bezel from that other
custom saber shop.
I've used them to install long AV switches on UltraSabers.
Here's an idea of how it looks for you. I know a lot of people don't like the high profile, but depending on the Saber, I sometimes prefer it.