E-REVO - Tranny question

[Shark413]

Hi, I am working on a E-Revo project and I would really like to use the Nitro Revo tranny and disk brake. The problem is how would I activate the brake using a brushless setup? On the nitro Revo there is a servo to work the throttle and brake, on a brushless setup the ESC handles the throttle and braking. I can disable reverse on the ESC but there is no provision for activating the disk brake via the ESC. I have a beefed up EMaxx tranny as well, but I would really like to use the Nitro tranny. Has anybody performed this mod? Any info would be greatly appreciated.