Training development in Navision

Hi, I know there are already posts about this subject, but I would like to hear the experiences of this group. And it would be nice if the sleeping smiley would disappear for a while. [:)] Well, to the point; How do you take care of training your Navision-developers? I now work for a year and a half as developer in Navision. I’ve taken basic, developer, developer advanced training at our NSC. Total 4 days training. Besides that I learn from my experienced colleague, a software engineer from our NSC and this website. I like my job and I want to get better at it. How can I? To become a certified developer I guess I should work at a NSC?