I don't, they usually find me instead
But the frame and parts shown are still with our Mauser-friends in Oberndorf am Neckar. The little cross pin is a simple, elegant solution to an annoying problem. It is effectively one of the little improvements on the original design.
All that Mauser did was redesign the thumb safety catch so that it would push the entire safety bar downwards or upwards, the rest remained unchanged. You are correct when you say that it will effectively alter the 'safe' state from up to down. This can also be observed on the 1904 Navy lugers that had their grip safety altered. The old 'Gesichert' was milled out and a new 'Gesichert' was placed in the upward position.