Some of the modders here will know more about this than I do, but I think you have to be careful about current.
The
BLF A6 Special Edition (note that Manker was dropped from the name) runs in direct drive. After a spring-bypass, it can draw more than 5 amps from the best high-draw batteries. Even without a spring-bypass, current can be above 4 amps.
Any switch you swap in must be able to handle these currents over the long haul.
This
post at BLF refers to others on the subject. It might get you started you in the right direction so you can learn more.