Would a tail switch on the SC31 Pro provide any benefit besides using the tail switch to mechanically lock out the SC31 Pro instead of loosening the tail cap (which would probably be a more reliable lock out than a tail switch) if you do not want to use the Anduril electronic lockout on the SC 31 Pro?
It would not eliminate parasitic drain on the battery, assuming the tail cap on the CSTEBOKE SC31T SE is designed similarly to the tail cap on the Sofirn SC31T, as explained in another thread: