My point was, looking at the pictures, when you see a nice clean install, but no shuttle valve, you don't have redundant brakes.

This has come up many times before, but to prove you don't have "safety brakes" without a shuttle valve, all you gotta do is go out to your car, open a bleeder, and stomp on the brakes. The pedal will go to the floor.

If you are going to the trouble of installing a dual cylinder, go all the way. That is what I am saying. Stirring up the pot I guess, sorry.