I'm very sorry ti hear that he has passed away. My condolences go out to him and his family. I always enjoyed seeing his latest updates, and always thought that he brightened up any thread he posted in. May he forever rest in peace...
That's very unfortunate. I was looking forward to his revamped Darjeeling-Himalayan Railway and I was hoping to work with him on making a Swiss version of his Gartenbahn. Hopefully someone can use the TrainzDE link and contact his son and see if they can transfer all his content over to another computer so that it won't be lost to the sands of time.