The answer is simpler than you can expected. Of course, one can point out some manual skills and 40 years of the experience, but there are two my handicaps: myopia and an Asperger syndrome, which made me a perfect micromodeler. The first allows me to not use any contraption nor even a magnifying glass to see every detail while the latter causes me focusing on the smallest details, which were always of my greatest interest. For example, if you'll take me to the mountains with a camera, perhaps I will bring back few hundreds images of mushrooms, flowers, stones and pine cones but not a single landscape. Exactly my motto is: the smaller the better.