I’ve checked some of @DanielSt ‘s articles on his website. It contains some transcriptions of Amadassana Thero’s sermons; a few post translations from puredhamma.net; a translated transcript from a Waharaka Thero sermon; and some articles he’s written himself. (I hope I summarized that accurately).
Although German is not my native tongue, I can understand most of it. It is good enough to see that Daniel’s own descriptions of anicca and sankhara dukkha, viparinama dukkha and dukkha dukkha are described very clearly with plenty of examples. The diagram at the bottom of this page is very useful I must say. It immediately provides a brief overview of the anicca nature and the three types of dukkha.
For anyone who can understand German, it’s worth the read!