Hi Fullscale!
I'm assuming (a bad thing) that you have a Hacker setup there. Jeti ESC numbers are very similar to Hacker, and to my the best of my knowledge, the Hacker ESC is made by Jeti although perhaps to some different specs.
The Hacker ESC that I have is labeled:
Heli Master 40-3P
It has various programs to set the brake on/off, setting the timing mode and switching frequency for various motors and flying preferences.
I got mine and the Hacker C-40-12 motor from
www.FXAeromodels.com
And the website shows the various motor and ESC combo's.
My ESC was packaged with the motor and set to "brake off" and timing and switching frequency was already pre-set for the Hacker motor. Pretty much jus plugged them together an all has worked flawlessly since.
Hope this helps.
Happy Choptering,
Russ