I tried to make it work since it sounded like a good idea. I discovered two problems; one - there is no way to turn off the brake operation when in flight (probably resulting in bleeding the air from the brake air tank during flight). The other issue is that the valve seems to operate in both direction when using both up and down up elevator. I think this may be fixed by adjusting the percentages in the transmitter to make the valve work and then changing the percentages back to use the elevator servo. Even if this works there is still not a way to overcome the continued operation in flight as far as I can tell. BTW, you will still have this issue with a matchbox...Gary