You need to set up a mix such as aux2 to aux2 turn the page and activate the snap roll button and return to the first page. Flip the aux 2 switch to full speed brake position and push the offset button. Then return the switch to the speed brake up position. Now hold down the snap roll button and run the value in the highlighted box up to 100%. You'll need to watch the direction of the servo and you may need to hit the turn button to reverse the direction of throw. The speed brake should now go to full deflection any time you hit the snap roll button regardless of its position. I use a similar program on my wheel brakes using the same program only mixing aux3 to aux3. You set the % value to give you just enough braking to stop the airplane without locking up the brakes and flat spotting the tires. I have used the setup you are describing in conjunction with the low pressure braking and it works great. But if you fly the correct approach with the speed brake out and the power on all the way to landing and do it this way every the time you'll find you won't use the button except after landing for the low pressure braking. Hope this helps!

Tim Redelman