To anyone who has not yet installed this 'significant' upgrade in rigidizing and stabilizing the hand brake, I have a recommendation.
Follow deQuincy's recommendations, but DO NOT let the 'latch' for the ratchet system drop below the 'cogs or serrations' on the ratchet mechanism. IF you do, that will allow the spring that tensions the push button on the front of the handle to pull the 'arc' on the rod connected to the push button past the upper end of that latch. Guess what happens then!! The button, spring and rod come flying out the front end of the tube. You needn't ask me how I know this occurs!!!
Getting the rod back in is a very difficult if not impossible task, as I'm convinced Hans assembled the mechanism THEN installed the rivet on which the latch pivots. IF this does happen to you, let me know and I'll tell you how I got it re-assembled. Not necessary to post all that here, as now - HOPEFULLY - no one will ever need to re-install the rod with the arc, the spring and the button!