Anyone have the holeshot electric shifter?

[Bruiserman]

I just go the wholeshot electric shifter, really good price so I went for it instead of an air shifter. Have questions about the killswitch and if you have to use one. I wasn't sure and thought I would just install the shifter without it at first. Also, if you have this kit which killbox works with the busa, I am not sure if I got the right one. If not I was thinking of getting a different brand anyway.
Thanks