Senco sent me a restrictive trigger for my SNS45 stapler. Restrictive
trigger guarantees that not more than one staple will be shot upon one
pull of the trigger.
I found one page with instruction to be somewhat lacking, and created
a photo tutorial that shows how to install the trigger.
Doing so is not very complicated, but there are some gotchas that one
needs to be aware of, that I tried to highlight.