This such sad news. I remember very well Steffen’s dedication to 1/48 scale, the quality of his builds and extent of his knowledge, made all that much better by his detailed build logs and willingness to share info. If I remember correctly, his ritual was to take 10 photos of every completed build (8 points of the compass plus top and bottom views).
Sincere condolences to his family and friends, a sad loss indeed.
D