There are many brake systems to control an aircraft brake system. This is one of the simplest system to use on the market.

a. You can set it up so that full down elevator will activate the 3 way valve.

b. You can install a "Y" connector so that when full down elevator is selected, a separate servo will actuate the 3 way valve.

c. You can put the brake control system on a separate channel.

d. Contact Mini-Hobbies who has a proportionate control system that is very nice and compact. Cost is around $100.00